The firing sequence with the transfer bar is like some Rube Goldburg set-up. Rube Goldburg was a cartoon drawing genius who
did drawings showing a series of dependent operations working together to make something happen. Like a chicken laying an egg that drops through a funnel and rolls down and land's on a fulcrum, that in turn makes another object drop into something. You get the idea. I say check it all out, but do not disregard the extra lengthened firing pin. Why? Because a better design will be reliable and just smoothing things up will not be a long-term solution.