http://www.deeteeenterprises.com/NS....rriteRings.php

http://www.allerc.com/product_info.php?products_id=2609

One could get one from the above links. I would buy from allerc.com they are 3 dollars cheaper than deetee. 1.99 vs 4.99

Another solution for glitches.....buy a dx7.

I haven't had a single problem with glitching on my dx7. I was amazed, servos always sitting quietly waiting for input. I used to see all kinds of funny activity from planes and my axe on the fm, never had a ferrite ring.

The ACE bl-40 esc in my mini-titan came with one installed. It was there until I piled it in on the left side, the crash actually broke the ferrite ring in half (I think it took a good bit of the impact).