Guess what. Both my GSO finderscopes had the lens elements different to what Steve found. And not the same as each other. One I certainly played with. The other must have been opened as well. I rebuilt them in the order/orientation Steve gave in his image and both are now giving much better views. I'll check them more carefully next clear night. And have to refocus as well.
Thanks Steve.
I recommend this go into the Article section, if only to have the order/orientation of elements in a GSO Finderscope recorded.