Thanks Darryl. The one downside to ths design is that if I want to remove the boltI need to loosen off the lever a half turn and lift the sight so the bolt can come back but that is a small thing as I have it so the general 100 yd setting is when the adjustment slot stops at the screw shank so when the bolt goes back in the sight comes down to its lowest setting and the levers tightened a half turn. While this may not be convenient for some I don't see the need for any further adjustment although there is room to make it to 1000yds. Set for a couple of inches high at 100, it will do to about 200 and that is as far as I will shoot open sighted anyway.
The time it takes to make and regulate is way more that would make a saleable project unfortunately.