All supplies needed purchased. The area I live is pretty active, so keeping it private is going to be an issue, but these are Mexicans, they are pretty much up to messing around with mechanical stuff all day.
This should be all I need. The blade is meant for cutting metal, and I'm hoping (and better) the inside of the portion of the arm I intend on cutting is hollow -- we'll cross that bridge when we come to it.
I'm going to hang a tarp over the area I'm working, protect my eyes, and it should come off just fine.
I'll keep everyone updated.