I decided to fit the real rear sight base I had kicking around;
Going to have to cast a small part to fill the gap between the rear sight base and trunnion as pictured below; a small issue with the LCT receiver is of course the trunnion is not correct for a Yugo AK.
As well modified the bolt to slide under the rear sight base as required and sanded off the bluing/epoxy that LCT uses on their bolts.
For others info, the reference book I am using is "The Grim Reaper", a collection of pictures and information on all known Kalashnikovs and variants from around the world;
My LCT barrel does not have threads, and the OD is too large to fit my yugo FSB so I came up with this solution;
Going to JB weld and pin the parts together, will be solid and do the trick.
Engraving this weekend, should be able to throw a mechbox in it in a few days.