I finally figured out that my bike was running like shid because of this exact thing....the way my PC3usb sits on the ECU puts the buttons right underneath a ridge on the bottom of my gel seat (only about 1/4in above the bottons)...I believe the seat is flexing on bigger bumps in the road and hitting the buttons on the PC.i was going to put mine under the seat origonally but figured with my luck as soon as i sat on the seat something would touch the buttons and screw up my map,i have some more electronics going under the seat soon,so i think i will give it a try
word dude...I'm 6'5 295....Maybe Monty Flexes his seat a little more than you.
this is where I have mine, but the only thing is it doesn't allow for easy access adjustments.I put mine under the hump as recomended too but I sort of like Warbaby's placement better.