In another thread here I posted a UK source for 230v UK to 110v US step down transformers. Here it is again...www.newmarket-transformers.co.uk
For £52 pounds (roughly $75) you could have your Q7 fork mount up and running, a cheap investment for such a fine piece of equipment.
I live part time in the UK. So far, you are the only other person I've heard of who besides myself, has a Questar 7 here in the UK; it would be interesting to compare the two sometime.
Could you tell us what model your Russian 7" Mak is ?
At the moment, my friend Matthew is selling his Intes 715 Mak on the SGL classifieds; would be interesting to try it in our fork mount before it sells. Just for fun after reading your post, I popped our Intes-Micro Alter M500 Mak into our Q7 fork mount today; I think everyone will agree, its a bit overkill for a 5" scope, LoL.
Hank is right, an unoccupied Questar 7 mount is rare, we should make every effort to use them.