Beautiful rifle!
One question though. Does the built up rear square bridge in any way obscure the rear sight?
Looks as though the top of the quarter rib is roughly even with the top of the original contour of the reciever ring which would place the sight island at a lower level than the top of the rear bridge. Your front ramp doesn't look unusually tall though. I do like the stippling on the rear facing surfaces of the rear sight - reduces glare. Some would think it looks unfinshed, but there is a good reason for that type of treatment.