No thumping/clicking/banging. The drive is quiet. Is heard only when the head moves. Everything is clean and washed. There are no jams. I did know that. 1mm is a lot but I've wonted to try any possible setting. MD recorded on R500 are played very good. It's spin down after 5-6 second when it starts a truck(buffor ok). In r500 the best position of the magnetic head is when the laser beem focus on the black, ferrite core, when it's bend to it's normal, recordnig position. Not working here. The same head works fine in R500 so it have to be elektronics(possible that this may by a spin controle failure). How to upload a new firmware to this device? Still hole disk was recorded. No locks or errors but outer tracks can't be played fluently. I will attach some photo later.