I just found that I had a similar question last year. Never resolved my question. So now I'm back at it!
I want a RRS ballhead with a clamp to use with my small, tabletop tripods.
I currently have an old Leica table top tripod and a Gorillapod.
I'm thinking the BH-25 "looks" like the right fit and that the BH-30 may be overkill?? But, on the other hand, I like the rotation feature of the BH-30 and, of course, the additional stability.
I wrote to RRS and they suggested the BH-30.
Anyone have any experience with either setup?
(I currently use the RRS BH-40 on my "regular" tripod.)
Thanks.

