Deepsky instruments bought out RCOS and as a result no longer make the rc10c.. Deepsky instruments only make the ruggedised military special rc's. The gso rc's seem great to me and given that you are willing to spend a little extra on upgrading a few things that should be standard. A new focuser, secondary heater, focuser collimation ring dew shield, tak collimation scope etc. Look at some of the images from gso rc's on this forum. Paul's 12" is pulling exceptional images from the sky purely because he invested the money to fix what needed fixing and the time to tweak the setup to be the best it could be.
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