Ok gentlemen, I have to respond to this. Firstly, I may be new to posting here but I am in no way new to reading here. I'm also not new to life nor machinery. I've done my homework and read vast amounts of material on all manners of things before I ever consider posting. Where exactly do you get the idea.. any of you.. that I don't listen or take in what's being said? That presumption is imo tantamount to arrogance. Perhaps some "senior" members would be well advised to go back and look up the word forum... "A place for the discussion of ideas." Senior member syndrome I'll call it. I've seen it many times on many forums , although never directed at me. If members are just too tired to bother any more.. get lost then. So. Dave, is this forum on some kind of time clock like a professional chess match? I'm not looking at or working on anything at someone else's behest! I'll look into my situation using any knowledge from others that know more than me gleaned from various sources, when I see fit. I may never fix it. That ,my friend , is my prerogative. Once again, if someone sees my thread and doesn't want to respond...that's their prerogative. I have been friendly and mindful of peoples responses and I learned young to appreciate people's time and say thanks! Tinkerer , back a ways I said that the swing appears even. If I measured EXACTLY I would report that. OK? I've read everything I can find especially alrman's posts. No one as of yet has posted knowledge of haw EXACTLY this reciprocating cylinder set up works. Perhaps that's my fault for not narrowing my thread down to just that! Hey? That old 6 had bypass ports built right into the cylinders.. how bout that? So , Dave, if you're trying to get rid of me you're doing a good job . Is that too long winded for ya????????????