I'm sorry guys, here, a pic is worth a lot of words. With this 4x10, these two edges are slightly out of square to the faces, and I'd like to use a 4 3/8" Makita power planer to square them as I also surface them smooth.

I'm wondering if anyone has made a sled / whatever, to hold the planer square to the timber face as you go down the length?

my 12" T saw will square them up but I don't want to push a 14' 4x10 thru it!