The new v2.8 PCB is available here : http://www.megadrum.info/forums/viewtopic.php?f=3&t=456
What's new :
1) There is no more trimpot to adjust the contrast.
It settled directly with the keyboard.
2) A "Encoders" connector, to control MegaDrum with rotary encoders.
3) The pin 2 on "32 inputs" connector is now the High impedance HiHat pedal input.
You can select High impedance (pin 2) or Low impedance (pin 4) HiHat pedal input.
4) A "EXT" connector, for future extensions.