My Tower .46 - runs fine, no problems.
My GMS .47 - ran fine, but the muffler wouldn't stay together.
My 40LA - ran perfect. Don't complain about the power. Look at the size and wieght. Not much more than a BB .25.
My Rossi .45 - was unbelievable (after a very long break in) What a stump puller. Never touched the needles. Didn't like nitro.
My Norvel .25 revlite - screamed and was super light. Low needle needed tweaked often. Liked nitro
My Norvel .15 - okay. Runs strong wide open but transition bad (no low needle). Muffler mount cheezy.
My .32 sx - best of everything. Too bad I drilled it in last week.
My several .46fx's - as advertised. Did have one with the peel. Replaced.
Worst Engine - A Royal .40 BB about 15 years ago.
2nd worst - A K&B sportster .45. About the same time.