Rollin/sinker_63
As I have gleaned from your contributions , if a shooter wishes to lower the POI relative to the POA , one lowers the comb --- and one would interpolate that raising the rib by adding a parallel slat of balsa would effect the same effect as the muzzle would be lowered the thickness of the slat .
Consequently , when seeing a fairly wide section of rib between the mid-bead and the muzzle bead (with the adjustable comb at BDC) , after a 1/2" of balsa (painted black) was temporarily added to the rib with the effect of seeing none of the rib's top surface ( when mounted) and the POI and POA essentially converged .
Having accomplished "what" I thought you , Rollin , was espousing , I thought , "Dang , Charlie , Rollin does know --- yadayadayada "
That isn't what I understand from your advice to sinker_63 ; please , tell me I misunderstood that advice .
So , sinker_63 , if your gun shoots high , I'll say adding a flat piece of balsa on your rib will lower the POI 'cause you will have lowered the muzzle of your gun when you shoot .
Charlie
Charlie