Hi

Why don’t you solder the bases on no need to drill and if you want to take the of all you have to do heat the up and remove the Bases

Look also at the EAW ( www.eaw.de ) mounts you can get from them swing of and claw mounts for any scope and gun combination. I got original soft soldered claw mounts on mine with a 1.5 x 6 Diavari no problem with removing or fitting, for very long scopes use a front mount which fits on the front bell and goes on the barrel (camber)

Claw mounts holds zero every time and take of or fitting takes 5 seconds!

Cheers