Yes I believe so. Out of the box you need to hold the button on the keypad until the valve is fully open/closed.
You could probably get fancy and wire in a stepped switch/dial that only provides current to the motor on the muffler for enough time to open it fully/partially/close it fully.
I'm planning to getting around to wiring the switch up to the intercooler spray button I have on the centre console and just have it fully opened/closed, but atm have other things to focus on.
I just remembered the place I got mine from: MOTORWORX. It's not very far from where George (DOUGMO) works.