Very nice bro, that looks killer
I got some 8" lapping wheels on ebay from Kent supplies, they are 15 bucks each, I got a 500gr and 1200gr, and not having a machine I just gripped them in the lathe and free hand lapped em resting the scraper on the compound rest, it's working ok but I wanna build a lapping machine, and build a special tool rest that I can transfer between the grinder and the lapper easily. I got a 6" norton green wheel, I got it locally and it was kind of expensive, 37 dollars with a company discount. It's a 120gr, kind of a chore to shape the radius with that. With the 1200gr lap I was expecting a shiny edge but it's not, but it does cut like a motha lol.
One question I have about your planer, now that it's super flat, is the base parallel with the blade? Is there anyway you can test for that? Does it even matter that much? I would assume it's the same effect as a mill head being out of tram.