I used Crane machined steel +.050 locks (look a bit beefier than the stockers) and most are flush with the retainer. A couple locks are even a tad higher than the retainer( probably not even measurable). I just remembered I have a set of bad vortecs(cracked) laying around. I'll see if I can use the valves from the bad set. They have about 240,000 miles on 'em, but mavbe they'll clean up. I'll measure the rest of my valve tips and make sure that's the issue. I appreciate all the input guys.