Baader make a
Tak adapter which converts the M43 thread to T-2. Then you can add a
T-2 to 2" female adapter. I don't know if this will allow you to reach focus using a 2" mirror diagonal on the FS 60.
I have just received these parts and will try them out on my FC76 DC and report back. I also bought the Baader
T-2 quick change parts to use on the prism diagonal I already have.