well, of course there's always APCC. i had 2 pier crashes over the years that would have been prevented by APCC (had it existed). after the 3rd, i decided i'd better just invest in APCC. since then it has saved my bacon at least twice. to my great chagrin i had a 4th crash a couple of weeks ago, but this was because i had temporarily disabled the tracking limits, forgotten to re-enable them, and then SGP happened to crash that night. really, really bad luck.
i have taken to barely tightening my clutches so when the most recent crash happened, there was no real damage. but that very first time required me to send my RA gearbox back to AP, as the motor had burned up.
rob