I am the same way, all my gear is the proper Tak stuff, it was designed to be used in a Tak so therefore, use it
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I haven't used the FS-60 so I don't know the diameter of the focusing tube, the FS/TSA-102 are 2.7" and, as you know, have a dedicated CAA and reducer so I can't help with any thought of transfering the CAA and Reducer from the 60 to the 102.
There is a guy in HK that sells Tak parts, I will need to find his URL though.
Cheers