One of these days (a rainy day) when I don't have anything else to do (Ha!), I'm going to do that entire process in the IceInSpace tutorial. Right now I'm just amazed at the results that are possible. Of course if it weren't for some of the tutorials out there, I'd be lost!
Gonna have to try this with the ETX; trying to with the dob would probably be a little too much. What do you reckon your total exposure time was?