i thank you for the thread i now know to stay away from FL70.
I've bought OS engines since back when model airplane engines were chipped out of quartz with a harder rock. This is the very first one I've ever had any problem with. It is obviously a good design, but one single engine that had something wrong inside. I would have no problem buying another FL70 tomorrow. I would bet that if this thread were on the general engine forum, there would be a lot of guys there who'd post that they had no problems at all with theirs.
I've not heard anyone else have problems with the FL70. But then, I did a scan of all the forums and

didn't hear ANYTHING about it either.