Originally Posted by
Matt Trimmings
Why does it matter...J is for JR/Spektrum servos, which you have. A is for Airtronics. The J fits the servo you have (as it should), A does not (as it should). Measure the inner diameter and see for yourself.
Matters because I have a crap load of A's that I get with the associated servo kit. Thought it would be nice to use if possible but appears no go. Hope I did not cause you too much hassle to respond. Thought it was inner diameter related but wanted confirmation. Hopefully, some others will get some use out of this thread.