Tightening up worn out servo saver
Benmlee came up with an awesome idea for saving the servo gears from stripping http://benmlee.com/Genius_Servo_Saver.htm
However, my servo savers soon began slipping during normal flight so to tighten them up I did the following.
Took a genius o-ring and wrapped it around the servo arm. It takes a little effort to get it on there but it will go on, where there's a will there's a way
Then I used some plastic from a plastic document folder (used a hole punch) as a makeshift washer to keep the o-ring from slipping off.
*edit* I now have over 200 flights on these and can confirm they kick a$$. New o-rings will be tighter, but still will slip in a crash. Worn out o-rings will need to be re-set more often, even in lighter crashes...but will still hold strong during hard flying.
O-rings are stock and can be purchased in the feathering shaft set (it's a good idea to have a couple spare feathering shafts anyway) http://www.oomodel.com/walkera-geniu...t-p-61725.html