I have T2 seats in my FB.
Some extra things to note.
When using FB sliders on the FC seats, the FB sliders are only single lock, not dual which is why some people prefer the FC slider over FB. Personally, I didn't care. I wanted the lighter weight and lower.
If you use the FC slider on an FB seat on the driver side, you'll need to notch the fourth hole (make the circle hole a rectangle). This way it'll fit and you have 4/4 instead of 3/4.
Using FB sliders on the passenger side with FC seat, the FB slider doesnt bolt EXACTLY up. There is one of the threaded holes that doesnt line up.. luckily though Mazda had another hole about an inch further up the rack that lines up perfectly. You just need to get a bolt/lock washer/nut assembly since its not threaded.
I'm pretty sure I have thread here with pics I'll see if I can dig it up...
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