Since there are very limited amount of wah pedals in the QC, it would be great to have more! RMC makes one of the best wahs out there and my favourite from their line-up is RMC1. It’s fat, juicy and growls nicely. I have one in Helsinki, if you want it for research, I can lend it to you, just hit me up.
I have an RMC wah and they are awesome. But I actually think the best I’ve tried is the Jam pedals whacko plus, and use one in front of the cortex as the wahs on it just don’t get close imo.
I also prefer the sweep on a wah rather than an expression pedal.