RE: OS .46AX vs. Evo .46
When I ran my tests that I documented here, I used the stock muffler without removing the baffle. I should probably try it with the baffle removed.
Did you notice any lowering of muffler pressure with the baffle out?
My main point of the post was the difference in the AX and the Evo, which I thought was a lot. I have an Evo and if most of my planes weren't in storage while I wait repairs for hurricane Ivan from last fall, I would try it myself.