Hey fellas, I got a db meter.
I tested the 36 with the wolf muffler 7 metres in front at full throttle, 19x8 hawk prop at 7560rpm DB=90.0
I also tested another plane with a os 33gt that had a 20x8 xoar, I forgot to measure rpm DB=86.9.
I would have tested a pte muffler but they are supplied with a different one here in Australia.

When I get the canister ,3 blade prop and soft mounts I'll test the changes individually.
Hopefully I can come up with a winning combo, I'm actually very keen to see the change the false firewall and soft mounts work.

Regards Mark