I bought a FM Towns ODE recently to install in my old FM Towns PC tower, which is a model 2F.
The listing on Booth states that the CX version supposedly works in 2F models, but the cable is too short, and this turned out true.
Since I had some JST PH crimp parts at home, I reused the connectors shipped with the ODE and crimped longer ribbon cables for the connectors.
After a few mistakes with the crimping, things worked fine!
Havent had time to use this much yet, but considering the stock drive in mine is very dead, this seems pretty great!
Previously I was SCSI booting games through an external SCSI CD-ROM, which I think I’ll keep connect in the future as well for playing discs.