Anybody ever tried them on there planes?

Just looking at the links that BJ provides and that's pretty much what they are.

Used the Ergo 30 links for years on 3 or 4 different aircraft. They are very robust with an excellent wear rate and low friction. As I recall I have only ever replaced 1 link which I thought may have been getting just a little loose....

Saw a heli with the grey JR ball links with the metal ball and thought they were great, ordered some and not a single one turned out to be free of slop so I don't know how the ones on the heli I saw were slop free?? There's no way I'd need the ball reamer with the ones I got, I guess I just got unlucky.

I use the dubro ball links with the brass balls. You can put the ball in the link, then place that into a vise (flat jaws of course) across the flat of the ball and then tighten it up and it will expand the brass ball for a perfect slop free fit. Been running mine in a IC ship for a couple of seasons and they seem to be holding up well....

the ones for a t-rex 700 are excellent. stainless ball with a 2mm threaded stud and the end accepts a 2mm thread also.