Just trying to add discussions/ more content to this great site
I know most of us have ran nitro before coming to our senses. I've tried quite a few nitro mills before switching to brushless. Ofnas, O.S., Piccos, dynamites, sirius, trx, surefire, RB, infinity, sh, sts to name a few.
I hated small blocks, I always found big blocks much more tunable.
I found O.S. engines to be the best running and easiest to tune.
My all time favorite engine was the mid block RB .23, it was made for t-maxxes/revos and was just insane. It came with a matched pipe (shouldn't all nitros?) and really blew my mind.
It was finicky, tuning was critical. Once it was tuned, it was a rocket. It revved out so quickly and had amazing power through the whole power band. I learned how to shim diffs pretty quickly after getting this engine