I have to revisit this topic, and ask something that's been bugging me, and it might be a tad controversial, but I'm really curious from a none tree surgeon's perspective.
What's the point? Like most machines, if you were racing / competing with it I can understand porting tuning and trying to wring as much power out of the engine to within a mm of it's life. And talking about life, usually anything built for speed has a limited time between rebuilds.
But this is equipment used for your day job, time is costed in when you quote, ripping through a log 5 seconds quicker and adding those cuts up = x? mins per day.
Anyway, now I'll await the flack.