NitroSteel,
have a serious look at the QD Red Dot sight & base arrangement.
I have one from Wayne on my CZ 550 in 404 - works a treat & doesn't get in the way when reloading
http://americanhuntingrifles.com/home/accessories/
Great to deal with

Also of note is the 'trigger' for the 600 & 602 BRNO's - I wounder what is involved there???
Cheers
93x64mm