With my new G0704 getting plenty of use, I have worn out the crappy little pin thing for loosening and tightening the drawbar. I have some .223" O1 drill rod that I can use for making a spanner. I will need to turn a few thou off, but my question is whether I should harden and temper the pin, or just use it in the annealed state. I am certain the annealed O1 will be stronger than the mystery metal thing that came with it, but I don't want to have it be too soft, but I also don't want to make it so hard that it will damage the spindle. What say ye?