Welcome to the forums. I don't know that we have any members here with the MODX, but I use Yamaha gear and play outside quite a lot. Over the years I have played many outside gigs at ocean resort hotels and the only moisture problems I have experienced was when the road crew let it rain in my keys.......lol. However many venues with put an entire band with PA and lighting on one 20 amp circuit and expect that to work. If you aren't having this problem anywhere else, you are probably correct about the venue power. You should be very careful, as venue electrical problems can ruin electronics. I use a surge protector and uninterrupted power supply on my keyboards (which protects them from a voltage surge (or drop) causing me to have to reboot my boards). I only use a basic set-up which will either cause the surge protector to trip (surge), or the ups alarm to let me know there is low/no voltage on the circuit. You might Google for more info on touch pad problems. Good luck, Don aba B3maniac