Probably a hot pixel, and the tracking is so faultless it don't matter none
H, I will look it up later when on the astro comp, but I have been using PHD2 instead lately - bloody good stuff, SO much better than PHD1.x!
There is something about this GPD2 - it's been sold twice, and I bought it back each time (just ask JRC
He's since bought the LAST one out of Germany ) when I found other more expensive mounts didn't come CLOSE to this one - I originally bought it from Kunama, who bought it new, and he can attest too to how darned good this one is. Just incredible really, and light enough to be portable (seeing I have about a 2 hour window on most targets, transportability is paramount to me)
Anyway, the GPD2 is good only up to an FSQ-106 maximum - I doubt Colin's 130 would be any good on it, let alone any RC over say 8". It's pretty much a refractor mount, or light Newt/Cat (R200SS / VC200L)