OK, now I know why they're so expensive. I think I'm going to give up on making my own for now. I have rigged an old RC servo to do the job. I just ripped the guts out and am using just the pot and gears to damp movement. I attached an old fishing weight to the servo arm to allow the weight to adjust the resistance. Now I just need that electronics help to change the output to digital. Any takers? I guess I can figure it out on my own if I have to. I'd like to bring the info into my computer via the LPT1 port. Since I don't have a printer the port is unused. On a side note I pulled my dashboard out of the truck this weekend and took measurements to replace it with two touchscreen LCDs. Can anyone say GPS in the dash? I think it will be a bit better than indiglo and will be completely customizable.