Jimbo, I have a 12" RC and am using a STL11,000 from SBIG on it. The following image was taken with it and without a focal reducer or flattener.
NGC253
You can use an AP or Tak reducer or flattener with them and they work really well.
Yes they are not an RC from some of the more expensive brands and the construction is not as solid but the scopes do the job. I need to dedicate some time to writing up a review of the 12". Bang for buck these are great, but you will need a good focusor and a dew strap on the front of the scope.