Yeah, the reason I started using them is for that very reason. I think it was all started with my Excellerion 90 and that crap Evo 100 NX engine. It was a suggestion to try to fix the problems I was having with this setup. So, I went ahead and replaced the clunk. It did not fix the problem but I left it in.

Eventually, though, the engine was replaced with an OS 1.20 AX and the problems went away, but I kept the clunk in there and it has not caused any problems at all. But, I always try to remember to time my flights so I don't run low enough on fuel to see any problems as you mentioned.

Since then, I pretty much just install them in my planes. It's one of those things, I guess, that we gain confidence in for one reason or another, and even though there is no logical reasoning behind this, we continue to do so.

CGr.