JD, do you by chance know what changes were made in the system that Jim talked about? ...I wonder if Jim's even there anymore; the person who replied to my E-mail was named Mark, and the address was at axletech.com (
who apparently bought out U.S. Gear in November '08)...and, like I said, I had the impression that he didn't want anything to do with me.
Also, the DPDT switch wouldn't be a bad idea...except, as I understand it from the troubleshooting page, the system needs to be able to automatically stop applying voltage (or a ground, or probably best at both) to the motor once the motor's completed its cycle. I'm not sure if it's as simple as using a momentary switch and releasing the switch once it clunks into gear, or if it needs another second or two of voltage to finish the shift after you feel it engage, or what? For that matter, maybe that's part of what was changed in the update? towcat knows considerably more about this than I do, and hopefully we'll have an example to look at...and I'm sure he has some tricks up his sleeve