MG34,
I'm glad everyone's a little different, because the Glock grip angle works OK for me ;D - definitely not a 1911 or BHP, but it works fine. On the other hand I had a tough time with the HK...
WRT the plastic base plates, I use the machined aluminum ones from CPMI on my Glocks and my Browning (wish they made them for Sigs other than the 225) and they seem to work very well. If you like, I'll throw some for the HK on my next order and you can try them out...
Blake