I use Blum soft close hinges and I typically haven't experienced too many issues. Years ago I purchased a Rockler jig for lining up cup placement for European hinges, which is a big help. That said, I have found that even if the hinges do not initially snap into place a slight tweak on the appropriate adjustment screw is usually enough to bring everything into alignment.No one has mentioned the hinges. I built 2 cabinets with inset doors using the same hinges as you have used. I swore I would never do it again. It was a PITA. Really curiou about your method with installing them.