Since the EV-30 is a relatively new pedal and I was doing some relaxing today, I thought I'd post a few observations. Video of the cam mechanism. To see into the shadows, I had to lighten exposure so much the the pedal washes out, but it is hollow and has space for a battery since it shares same chassis as pedals that require a battery. If you hear any noise, it's not the pedal, just my ring touching it and callouses on my left fingers catching on edges. Size comparison to mission EP1and Zoom FP01, which is the same size as the Roland EV5 Size comparison to Zoom FP01. The EV-30 is a bit smaller in every dimension. The pivot point on the EV-30 is closer to your heel than the Roland EV5 and this Zoom exp pedal. The distance from pivot to the "heel" end of the EV-30 is the same as my older Mission EP1, which uses a Dunlop Crybaby chassis. Bottom plate is beefy - thick as a quarter And finally, this is looking into the heel end of the pedal to show the washer/bushing that takes on the stress for tension adjustment. It's thick and should last through years of friction and re-tightening.I like the default tension. It looks like you can really crank it down though. As far as use/performance, I'm using it mostly for wah so I shortened the travel by inserting a spacer. The photo above shows one spacer. I added a second spacer and I like the travel better. It's a bit more travel than the Mission/Dunlop, but short enough to do a full sweep quickly. To get similar travel you'll need something about as thick as two quarters. Regarding size, my foot is USA size 9.5. This is long enough (for people without giant feet) to fit the heel and ball of your foot onto the pedal. It's 7 & 9/16 inches long (192mm) by 3 & 3/16ths wide (80mm) by 2 & 5/16ths high (58mm). If you wear boots with heels, I'm guessing it'll feel "normal" and you won't have the ball of your foot hanging off the front like you'd have with a pedal 4.5 to 6 inches long. I turned the min/max knob to max, calibrated with my Gordius Little Giant, and I use the Axe-Fx to set different sweeps and curves on FX blocks, which means I only need one output. That said, if you're using 2 independent hardware stomp boxes that require different sweeps, this is a very handy pedal.