I just put mine upside down on my board. But I agree the in and out could be reversed.About the only qualm I have with the HPF 3 is the sequence of the in/out jacks. Makes for some challenging pedalboard wiring. Never thought to reverse them. Thanks for the idea; will look to do that. As for sequence, I prefer the HPF 3 after my pedals to filter out any "useless frequencies" they might add, especially my Octaver.