Jim, I got both dro's for mill and lathe from eBay, I'll have to root around for paperwork. They were the less expensive ones out there. But have been flawless. One of the scales for mill wasn't working properly at first. Simple fix, it was just dirty. Have to make your own mounts. But that is pretty simple. I only have two scales on lathe. I am looking to put a cheep slide scale on tail stock. I'll try and find some more info for ya.
Back of the bed scale
And slide scale,
And finally getting back to the haul truck. A while back I got this rock crawler motor/esc. I'm thinking it will be better with the sensored motor for easier start up and low speed. Yeah it's already geared with a3:1 diff, a 4:1, 4:1, 3:1 tranny but the big motor I had in it would just spinn up too fast and was slapping all those gears pretty hard. Just a matter of time before some broke. Like the driveshaft first!!