Solved the FTE issue on my Saiga 12. Thanks for the Info.... My 2 cents to add to the post!!!!!!!!!!!!!!
I used a small framing square to remove the gas block worked like a champ Then on reassembly I found that a ¾ PVC SCH 40 pipe cut to length to clear the barrel also makes a great tool for installing the gas block.
Hope my first post helps others that do this mod.