i used old duratrax alu skid :) cut it and polished it

OK, I did the "mod" using a piece of 1/8" 6061 and I was ablet to run it for more than a few minutes and it didn't thermal, but it got HOT. I can't believe how hot the Quark gets. I'll see how it acts on the track.

I just hope that I don't need service on it as that is now out of the question.

That's not right. I'm running the Hyper 8 way overgeared and the Quark only gets to ~140 after 15 minutes. On the Revo, it stays even cooler, but I do have a bigger heatsink on that one.