No4 Scope mount holes misaligned and drilled too deep?

[jss]

'..... head down, steel helmet on......INCOMING!'

Oh dear, which forum do I get my steel helmet from?.

I still feel that the BA20 looks as if it needs at least beddng on Araldite or something, and the screws just don't look man enough, although they might just do the job with loctite.
I will try it on my No4 MkII which is correctly drilled and tapped.
Could anyone advise on suitable scope and mounts for the BA20/21 combination to give lowest line of sight in order to avoid adding a cheekpiece on a No4.
I will also try the steel "no gunsmithing" option from bisley on the savage/sterling 7.62.
Thanks again for the interest and input.