I just got my Wildhorse probe in the mail today. I ordered it before the original post here about it. If I'd read the post before I'd not have ordered it.
The probe is much nicer than I expected. The fit and finish are very nice for the price I paid for it. I can't speak to how it functions yet, but hopefully this weekend I can.
I'm going over to Jim Dawson's tomorrow to work on my mill retrofit and hopefully we can get it hooked up and try it out. It uses a 3.5mm stereo plug to hook to, and I ordered one off Ebay, but it won' be here til Monday. If Radio Shack was still in business I'd run and get one, so I'm not sure where to find one locally.
I had originally looked at one on Ebay, but they look like cheap junk compared to this one.
I will post here when we get it working.