Thanks guys. Unfortunately an EQ mount isn't financially possible at the moment, maybe next year - so I'll have to squeeze as much out of the Dob as possible.
I've already fixed the protruding-nail teflon on the Alt controls and loosened the spring connectors, will probably grab some weights if I decide to unspring it completely. I've chamfered the Az teflon and about to grab some sliders for the base. Hopefully the next manual-tracking session won't be as jerky after these changes .. it was close to impossible tracking Jupiter with so much resistance and overshoot!
Now to figure out why the camera drivers
crash my PC.