Sirius Glass, I actually figured that out about the cocked window on the CX just as you were posting this!

Right on the GMS - I was mentioning upgrades I know of on other Hassy bodies - my question though ultimately that I'm looking for is what are "all" the upgrades - what's different on a CX besides TTL from the 500CM? Or is that it? Was there internal reflection improvement? Any mechanical improvements?