Ugh, the infamous 100NX. I have mine in a clear box on a shelf to remind me not to buy one again.


However he says he has the 40.

I've found the smaller engines to work very well, once you eliminate the useless and problematic limiters.

It does sound like he is running the low end a bit rich, and this may be the fault of the limiter or the "walking needles" which the Evolutions are so prone to do.