Top quality CNC machined sequential shifters produced by MBWAC (DCT Shifter).
For builds demanding UP/DOWN selector style it's very robust and durable product.
 
It features two heavy duty microswitches that can be wired to the GCU as two independent inputs or one common switch.

Tension of the selector is just in the sweet spot of nice sequential click feel and guarantee of no unintentional shifts.
 
Turnaround time is 2-3weeks.