Buzz - I have a Sosylva also and found I had the same problems with mine. Machine is great for cutting signs and such but not accurate enough for what I ultimately want to do. I think part of the problem is in the all-thred lead screws. I am assuming that the pitch varies slightly through out the length of rod. I also noticed differences when making conventional vs climb cuts. What I did was cut test parts and decided what would work best. I modified drawings, speeds cut direction etc...until I had something I liked. I then cut all my parts at those settings. For example I know that some of my Joe's machine parts are not exactly sized correct, but all of the parts are off the same amount. So it all fits fine. I have not finished my Joe's yet and will not for a while, but I did buy precission leadscrews for this reason.
Dwayne
Never underestimate the power of Stupid People in large groups.