I use Fuji exposed blank reel seats and like them.
Arbors are not used. The seat has to be the same ID as the blanks OD. You may not be able to get the seat in the exact position desired but the ID increments are small enough that you can get it very close. Usually less than an inch.
I build most rods with them because I like the look, not because I notice any more sensitivity. I like the fact that they are available in lots more diameters so I don't have to mess with arbors. I also like that they don't add weight because of the arbor and huge gobs of epoxy. They are also closer to the diameter of the blank and I think that they are visually more appealing.
Buying Chinese made goods is aiding and comforting the ENEMY.
Boycott "Made In China"