Paul,
              Thanks for the info re engine mount bushes.
The only one that now worries me is the isolated rod end
which is bolted very close to the engine, bur hopefully
enough heat dissipation to last.
    Now where are you up to with your muffler design for
the renesis.. If you can post the approx design I will
attempt to copy it here as the freight from the USA will
go a long way to building the thing.

Neil.

The top part of the engine is cool. It is the spark
plug side down and around to the exhaust that gets hot.
The intake manifold runs cold due to evaporation
of the fuel.

Here is what I have so far on the RX8 muffler.

The RX8 engine is kind of easy on mufflers so I think
.049 thick 321 SS ought to be OK.

Paul Lamar