Thanks Steven. Yes I did - in fact I have not touched the left side (with shutter mechanism assembly) at all. The soldering was pretty quick so the plastic parts holding the flash contacts is intact. It does work fine for all slow speeds apart 1/30 that's the thing that puzzles me. And the Kiev 6C one works fine for all of them.

Do you know what releases the contacts and closes the circuit to initiate the flash? I have not been able to figure that out and not sure I ready to disassemble the shutter mechanism for that ;-(