| I've used a Diaphragm 48 tooth and an STM 6 post 12 tooth.
The Diaphragm used to "kick-back" through the lever quite hard when it slipped, which I found obtrusive.
So I flogged it and put in my old 6 poster. Finickey to set up, but works great when done.
Careful you use alloy plates, as the steel ones knacker the alloy baskets.
I think the STM 6 poster was about £400 from Casoli (a while back).
Spinoli |