Coping Sleds for Router Tables

First real post so, I appologize if it’s in the wrong forum.

I’m putting together a sled for cutting stiles on my router table. Using a 12”x16” phenolic base 1/4” thick. Kreg’s 3/4” rail w/adjustable set screws to eliminate slop in the channel. 5/4 stock backing that has a single toggle clamp and an old plastic handle from a bench plane. 3/4 high density plastic that will be extended to the bit for support and to prevent tearout. Extra fine self adhesive sandpaper for under the work piece and an adjustable knob from the same plane for the front.

So my questions are: Overkill?, Justright?, or Do you think I’m missing something major? Also, do you know a good supplier for the high density plastic for 13” or longer lengths.

Thanks and I look forward to posting more.

Dub

-- Dub