Planer mod question for recessing decks

[createinquiry]

I appear to have hit the limit of my planer when recessing the deck. My issue (diagram below) is that the leading plate on the planer is striking the foam where I'm transitioning back to the normal deck height. Before I take a grinder to the leading edge of the planer, anyone have any clever tricks?

I am due (wife agrees!) for a new planer as this HF planer is now spitting out equal amounts foam and shredded plastic. Here's a picture of the board in process. Hoping to finish shaping in the next two days, then on to my first vac bag lamination.

[TallDude]

I use a bigger router with a 3" long bit and jig for any deep recesses. It's way more accurate. I attach two masonite (wood) guides along the rails using long drywall screws right into the foam. The guides slope following the deck recess I want. The I have a router guide (jig) that spans from guide to guide. I detail the corners and transitions by hand. If you want a little ridge or concave, build a jig with an arch.

I have decades of experience with planers, but they are not my go to shaping tool. Specially with 1# EPS.

This photo is an example of the jig. The router shown is one of my smaller routers, in a shaping box I made. You get the idea....   

[PonoBill]

Yup, use a router. Or rough it with the planer and sand it to the finished contour. I was about to buy a couple of routers and a plane to shape some boards when I remembered that I'm better at electronics and welding than I am at hand tools. So one of my next projects is a shaping mill. Should be done about 2024, when I'm 77 -- or pushing daisies.

Maybe I should just get good at shaping software and rent time on a machine.

[supuk]

i have just used my sander with a 40 grit pad in the past as its easy to see what you are doing but the router is probably a safer bet if you have one.

Bill you defantly have to set aside a lot of time and a few years to build a good cnc mill, i never thought it would be so time consuming to build however when its done you will hear me whooping from here!