He didn't build it from plans, he looked over my Lumbermate, and built it out of his head. I'm the same way, i never build from plans either.
Anyway, the origional motor was an old 10hp OHC Honda that was on a power cement trowl he found laying along the road. Someone must have lost it off a truck? Now it has a 13hp cheapo Honda copy on it, that you can buy from Harbor Frieght.
He's been using cheapo lennox bands, made to the length he needs, he sharpens them on his home made sharpener once or twice and then throws them away.
It's a mobile home I beam track and the rest is just from his and everyone elses junk pile... lol (except the guides)
Here's where he keeps all his chainsaw/sawmill "stuff", he sawed out all the lumber for it from tree's off his property,
BTW, that old OHC Honda is now on his garden tractor... lol
SR