So I got everything working fine, last thing is matching forward and backward stitch length. I've watched all briliant videos from Uwe. Can't thank enough.  But when I try to make adjustments on stitch length fwd/bwd, the whole assembly moves. I tried oil, penetrating oil, heat, cold and even tapy, tap, tap technique. It wont move a bit. After having a good look, I noticed pin in "feed changing fork asm.". The pin is in the part list (page 11. "reverse feed control lever components" ref. no