Cyclic, can you be a little more specific about the "problems?"

I mounted my Aresti engine inverted - as designed for the plane - and mounted the tank just a very small amout too high. There is room to lower the tank. This caused a siphoning effect. I thought I did a fair job of describing why I thought this was a GOOD THING on an inverted engine.

The remaining text was addressing hydro-lock and fuel in the muffler.