AL-2 Fanuc 10T

Hi, just got me a "new" toy, basically saved it from being scrapped. I have a couple problems left unsolved, first the spindle doesn't spin properly in the manual modes (jog and mpg), it creeps slowly to the wrong direction when pushing the start button and the pot does nothing despite it works (it's a 1K pot, maybe wrong size?) In MDI and programs it works just as should. Second thing, I would like the tool setter offset numbers inverted to negative because I mirrored the X-axis. I can fix those relatively easily manually though. Any suggestions here? I can use it as is but would be nice to have it work properly.