Nice looking little machine there, but yeah, lose that monster drill press vise!
Don't know if this is the case or not, but the mention about feed pawl not completely engaging reliably sounded very familiar. I had a similar situation develop on my Peerless shortly after I'd pulled it apart and cleaned everything. Turned out the cross feed screw just needed to have a touch more drag on it. Instead of the pawl clicking happily over the notches and then engaging, the screw rotated so freely that the pawl could push it a bit and it would skip an advance every now and again. I put an eighth more snug on the nut at the other end of the screw and it's been perfect ever since.
Just a thought. It took me a while to figure out was was, or wasn't going on with mine so maybe it'll save you a bit of time.
-frank