Delrin ball?
So, what's a ballpark figure for replacing the ball? Given a sedate (non-3F) flying style, minor aerobatics but hardly any stress on the drive train at all- other than normal running.
The ship has approximately 100 flights of 10-12 minutes duration each. Good alignment, no shakes or buzzes, etc.
This is only my second uni-ball X-Cell; I murdered the other one at 35 flights, so I have no idea how long htis thing is supposed to last...
Steve