you are right james.This from cloudynights thread.The latest version F 60CB/Q model has enough travel for visual use unlike 60C.
quote" Hyia mention the review from the great Ed Ting (
http://www.cloudynights.com/ubbthrea...emlins/bow.gif). Mr. Ting talks about the focus issues with his scope when configure the top line in the given diagram. He reviewed the FS-60C and maybe not the FS-60CB. These sopes are different. Maybe this is the reason why Ed Ting is having an issue with it.
So when you buy the FS-60CB, you will not having this problem and don't need any extra tubes. "