Yep there are lots of machinists out there..Youtube has plenty of vids of their creations running etc. Wonderful work indeed..Many of these guys have lots of talent.

I was just wondering about peoples backrounds cause it becomes part of the discussion. Either you know or dont know stuff..

That engine was made by one guy for his specific reasons. You can view his entire design, creation thread over on RCScaleBuilder.com if you so choose.