Wow,the virtual track routine sounds interesting....how long does that take Col?
Seems like you'd have to take an exposure of your sub length at every start point and finish point in the sky, of each series to get the best out of It?that wouldn't be very practical?and with different sky condition changing all the time?
Have you done a virtual test yet?
Anyway the mounts sounds great

I just new It was you who brought all the clouds around