No, but my 450 has just developed the wobble issue. I am convinced it is not the dampeners though. I took apart my head, and I think i either didn't put the thrust bearings back together correctly (not likely) or because i didn't clean and lube them. I might have gotten some sand in there. It's very dry and sandy here.
Anyway I will be ordering some probably with my next order. BTW Helidirect stocks them. I'm pretty sure my dampeners are very much in good condition, but i didn't have the wobbles before taking the head apart. I'm fairly certain when i take it back apart and clean & lube the thrust bearings it should take care of the problem. I'll let you know what I find. I might be taking the head apart as early as tonight.
I don't know, most of you have probably seen this video. ANYTIME i want some entertainment this never seems to fail. I've watched it so many times, it's so crazy.