So ABS is really useless or very problematic - even part with external dimension accurate enough have problem with inside stuff so conduit don't fit between bearing. So I have to solve PLA issue first - well, it is usable for other stuff to so not big deal, just surprised me that it makes such problems. I prepared small calibration block with two holes in it and one internal area so I can test sizes before I start real print.
ad outrunner spindle - well, I already have motor, ESC and Arduino laying unused here so it is just about some cheap stuff. And I hate brushed sound :-D