I just finished building the Hairball/Mnats Rev A kit. I got it calibrated and signal is passing, but the attack pot does not appear to be doing anything, although it does turn the Gain Reduction off in the OFF position. Other than that, it does not appear to control the attack time at all. It appears to just have a fast attack time. The release time works fine and I checked the wiring and everything looks correct to me. Any help would be greatly appreciated.