lol...
FYI- I do them on a cnc mill, so you can certainly captain caveman them if you like or have all 3 exactly the same to the original measurement of the valve, its up to you guys.... but for price wise your not gonna beat the man modsrx, he can do them for $4......................
good luck guys, youll need it!
the price u got them to be coated are pretty good :-)