I made the plates and sprockets using a desktop CNC mill. I also used it to modify the shafts and axles and make the sprockets holders to connect to the shafts. I've had the mill about 2 months now and should have gotten one years ago!

Correct Panther G, everything else (axles, bearings, screws, chain, standoffs) can be bought from other sources. If somebody were to mass produce the plates, they could die cut them from the same sheet material that's used by the HL gearboxes. I'm guessing that would be cheaper than laser or water jet cutting. Not to mention faster, too. Like dyeager535 said though, are there enough T34s out their with owners willing to do the mod?

You think people would be willing to buy just the plates? You mean this mill can actually do something to help pay for itself!?