Philip Perkins wrote:

I'll second Charles. To be precise, the 1200 is more than double the
weight of the 900. 80 lbs is a weight to be truly reckoned with if you
have to transport the mount long distances to dark sites.

I have an AP 155 EDF, 4" Field Flattener, and a Pentax 6x7 attached to the
end of it. And on top of that is an AP 80mm guidescope. The AP 900
carries that load with superb stability and tracking precision, even in a
moderate wind. Check out some results:

http://www.astrocruise.com/aln99.htm
http://www.astrocruise.com/m31.htm

Your images are very impressing.

Thank you again to everybody who helped me solve my 900 vs. 1200
problem.

Now I will retract.
I have arrived at a decision when white smoke comes out from my
monitor.

Best regards,

Niels Foldager