The first pic is showing the DV that I mill down,I then take another valve and pressed it onto the milled one,I cut the extra off,weld my seam and clean it up,takes about 2 hours to complete a set.I have lots of materiel so its not a big deal for me.there is another post from a guy who says he has used inserts and they work good,so it would make this part of the job a hole lot painless,I am hopping to beable to start it tomorrow