Yes I ran across a few forums mentioning a P94 conversion kit, so I think you're spot on there. I searched around some more and found some XXX type brushes made by Team Brood. Here's a link to them here. They also sell the F brushes and 729 on there, as well as various others. I remember guys running the F and 729's quite often back in the day, but can't remember their properties. I found some Trinity 4380 as well, which are listed as hard copper. Anyways, thanks for the help so far! I'll keep looking around for more info, I think Integy has some hard copper ones on their site, too. If anything I can experiment with the Orion motor, since I can buy more of those brand new and don't care as much about ruining it, also I believe it draws the most amps and is less efficient so it would be a good gauge regarding wear.