I can't recall the last time I had a dead stick but I do know what plane it is, it only happened during the set up of the plane during all the trim flights, that was over a year ago. It was a plane problem and not an engine problem from the start so it doesn't really count anyway. I had to install the fuel tank way too far from the engine due to the planes design, a scratch build.
It is my only two stroke in use too, the SK .91. The SK muffler is a copy of the Ultrathrust and has no baffle.
If you are having dead sticks then you are having other problems that have nothing to do with the muffler. You should never have a dead stick with the DLE unless you have something like an ignition or spark plug problem.
Dead sticks happen because of a reason and it isn't the muffler.
AMISH, I'll bet you big money you don't have the original door handles inside the Pinto!!! I drove them when they were new and have a lot of memories about them!!