Today I had a Futaba S3004 fail in a Twist. Slowly the right aileron fully extended and stuck that way. My best efforts eventually failed and the Twist hit the ground in a spiraling dive. Long story! RIP Twist fuse.
A while back a S3003 servo would do the same but recover. Just loop for bit as it was the elevator servo. Took me a while to narrow it down to the servo as it was intermittent.
3 more S3004 have had to have new gears installed.
I have been flying a little over a year and my 3-D skills are modest. I rarely stress these things but with the barn door surfaces it apparently does not take much. Both the Twist and the Funtana were/are set up for max throws on the horns and arms but still short of max suggested. Used supplied arms with the servo's and included horns with those two planes. I use stiffer rods and more durable clevises. Also don't use the CA hinges, both have pinned hinges that swing freely.

I have read plenty today but there is much experience and honesty here!

Opinions on servo's from here will be greatly appreciated. What is dependable and; if possible; not incredibly pricy.
I have a 40 Funtana and that I fear to fly now as it has the S3004's in it and the Twist is repairable....same servo's.

I set myself up Futaba. 6APS pcm tx....fm and pcm rx's.

Thanks Michael