Roundhouse question

[nalu-sup]

Looking for some help with a move that is my current challenge.
One of my favorite moves on my other surf craft (windsurfer, waveski, and surfboards at one time) is a tight carving 180 degree roundhouse cutback that  stays high on the wave face to maintain speed, and comes back high into the white water for a quick redirect back down the line.
I am having trouble making this move on my SUPs so far. I can get a tight cutback, but I tend to run out of speed and turning power when I am just past pointing straight at the beach, or just past a hard 90 degree cutback, but short of a full 180.
I have seen a lot of guys do a kind of tail shove that kicks the board around 180, but I believe in turns that carry speed through them rather than shoving a tight turn that breaks the fins loose and scrubs speed. I usually attempt to carve off my heel while making a strong sweeping back motion with the paddle. The paddle definitely helps start the cutback with power, but I usually run out of paddle sweep about half or two thirds of the way back to the pocket. It feels like part of the problem is that the paddle stroke is pulling my shoulders the opposite direction from the turn and is killing any body rotation around the turn; whereas on all other surf craft the shoulders are rotating heavily in the direction of the roundhouse. i have tried the technique of switching the paddle to the other side which does help to rotate the shoulders the right way, but I have yet to really figure out what to do with the paddle on this side; brace, back stroke,??
Not surprisingly, my roundhouses are way better when riding backside, because then it is like a toe side bottom turn high up on the wave face, or a high frontside toe turn after a deep fading takeoff, and the shoulder rotation and paddle work is easy.
I know that tons of speed is key to a good roundhouse, and those are definitely my most successful, but still short of full 180 coming out with speed back towards the pitching lip.
Grateful for any suggestions.

[supthecreek]

I find it easiest to do this when going backside , so the roundhouse is a frontside turn back into the lip.

I start behind the peak.... drop on an angle towards the bottom and the shoulder.
Make sure my bottom turn is a long carving one that gains speed
I carry the speed out onto the shoulder, in an arc toward the lip line of the wave....
before I get to the lip I have the bottom of the board flat to the wave surface to maintain speed...as I reach the lip, I am fully compressed
Just before the top of the wave, I begin my turn back to the pocket... by slowly uncoiling my body
I don't plant a paddle to rotate around
I feather the paddle flat against the wave as a brace to keep me balanced on as I turn... the turn comes from my body and board....
The paddle is skimming the water.... not deep  like a pivot turn
You must release the built up tension in your compressed body all the way through the turn , till you come off your rail
As you reach tje bottom of the wave again.... you should still be carving
Carry the carve until you are aiming up at the lip.... unweight the frontside rail and begin to transfer your weight to the backside rail and the tail
before you reach the pile of whitewater, throw the nose up a bit to climb the soup at the peak
you want enough control to bank off the whitewater and use the "bounce" to turn you back towards the shoulder as you float down the whitewater
The trickiest part is keeping the nos up as you get out in front of the wave... where the water id=s relatively flat
use the new drop speed to carve a backside bottom turn towarde the shoulder.

in the following video... I had a bunce of people inside... so I carried the turn into a flyaway kickout 

Watch the inside rail of my Speeed through the cutback.... it never slides.... it carve through the entire turn (cutback)
the entire cutback is almost a full circle

[juandoe]

I like how you place the drop of water to maintain your anonymity.   

[PonoBill]

I'm not good enough, or conscious enough of what I do right and wrong to really answer your question, but I find two things enable me to carry speed through turns--moving my feet to the side of the turn, especially the back foot, and putting more weight on the back foot which is generally on the hip.

That's all I got.

[SUPcheat]

I finally did a series of 90 degree cutbacks on a wave today from crest to trough and back a few times.  Difference was, I intended to do them and I was in control, Yay!

It felt great going from the body to the tail with the compression and forcing rotation.  Maybe I am finally getting it.  Need more waves to keep trying and see if it is a trend rather than an anomaly. 

Right foot at right angle to rail close to kick pad and forward foot in some kind of staggered surf stance.

Dead anchovies everywhere today in Santa Cruz, and some larger fish, water was like oily, rotting fish soup, made me a little nauseated. I can't eat fish, anyway, it all tastes like rotton soap to me, and the odor is worse for me than most people.  Hope it was just oxygen deprivation with the warm water and not a toxic plankton. Dozens of these little fish would jump out of the wave faces as they broke around Sharks.

[nalu-sup]

Thanks everyone. Rick, I think that your post may have found the solution when you talked about releasing your body compression throughout the turn. I think that I was trying to make the turn so sharp, that I was using up all of my body compression in the first 90 degrees of the turn, leaving me dropping down the face with nothing left to keep driving the board another 90 degrees back towards the pocket. Today I tried making the turn smoother and unloading the compression more gradually so that I still had something left to keep the board turning for the full 180. I definitely don't have it nailed yet, but my backside roundhouses (toe turns) were consistently coming back off the white water, and my frontsides (heel turns) were at least making it back into the pocket, though still not up off the top of the white water. Your video really helped in terms of seeing how much you loaded up the flexion in your legs before starting the turn. I focus on that for my bottom turns, but I think that my legs were only flexed half way before starting the roundhouses.
Thanks again for the really thorough analysis; thats the way my brain works (for better or worse  ).