Just a bit of praise for these rings. I am a firm lover of all things Sako, however if you want to put a PMII on a Finnfire (I know its OTT but I like it) then you are a bit buggered with no Optilocks available. I looked at 11mm rail to weaver/picatinny adaptors and 34mm mounts on those but they were ugly and really Heath Robinson so the net trawl began.
Eventually I found Third Eye Tactical and ordered a set of 11mm rail to 34mm rings from Swillington and they are cracking. Very well made (much better than sportsmatch etc.), each ring pair is numbered so that you don't muddle them up as they are made with tops and bottoms mated and overall really very good. Worth the £125 per pair easily.
My only possible gripe would be that they are only available as a high set and I could have used mediums to get the 50mm objective that little bit closer to the bore, but I am really pedantic like that. Anyway they do quite a few types and I would strongly advise if your after rings that you take a look.