[QUOTE= ... It will give you something that looks OK, but it won't be as good as the result of the mono process. It can't be... two thirds of the data is being "thrown away."[/QUOTE]
Have a look at :
http://astrophotography.aa6g.org/
Taken with a (now) $(us)1300.00 Starshoot pro. Amazing what a cheap camera and the right skills do !!