Welcome Eddie. It is interesting to look back at how one's interests in particular genera have changed. Like you, I had some Mamms way back, then got very interested in Rebutia, Sulcos and Weingartias, and now full circle back, although I also am enjoying Eriosyce (or do I still call them Neoporteria etc..). As my plants grow and take up more space, the decisions I face are now which genera do I give up, or dare I curb my enthusiasm for Mamms. It is never easy!!
I hope you find what you are looking for here, but if nt, do let me know, as we haven't changed the structure of the forum since we started it, and though we tried to cover all bases, all suggestions are welcome.
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Chris43, moderator