a sound kinda like a burr grinder.
This is how the feed gearbox sounds on mine now, but the spindle is very quiet.
At this point, the lathe is not the source of most of my machining error. Hopefully that will change with some seat time! I think the wear in the ways and leadscrews is probably going to be what limits the precision of this machine.
I could re-scrape the ways, have someone make a new leadscrew, and make myself a new cross-slide leadscrew and nut, but I'd probably be better off saving that money and buying a nicer machine instead.
15 thou tolerance is I think worse than a harbor freight drill press!