I have 5 JR metal servo arms that will not fit my JR 8611a servos. Where can I find and what arms are you useing? Thanks

Are they SWB? Usually with the aluminum arms you have to use the servo screw to tighten them down. Yea, it's really tough to get them on and off but you don't have any slop caused by the arm slipping on the spline.

I found out the hard way that you need to position the arm and screw it down over the spline. Same thing with 8411s.

While it is probably very secure this way, it's a pain to install or remove.

I'm still split on these arms. I think I like the SWB metal gear better.

They are easy to remove..just get a small thin-bladed screwdriver and gently apply some pressure to the bottom of the arm while rocking the arm back and forth..