I have a 2 year old GM-8 and was out Saturday night as the temps got close to freezing. I think the grease in the mount got close to freezing too. The mount started getting real quiet -- not silent, but quiet -- and the 15-second exposure stars started looking a little like comets. It's a 492 system. I have the encoders with the Nexus system and it kept dropping out and saying the telescope was not responding. I thought it was a cold Nexus or iPad, but now I think it was its way of saying the telescope wasn't moving or at least keeping up. Is that expected from the factory grease? The axes were for sure stiffer when I was taking everything down than it was when I put it together earlier in the evening. Not hard, but more firm.
Thanks!
Bob
