Not a big issue at all...but was just wondering out of curiosity, on my Nuarc MSP 3140 I have the push button controls..I see now it has a touchscreen display...would it be possible to swap out the push button pad for the touch screen pad? Again, not a major issue at all...was just wondering if its possible. I'm assuming the touch screen pad type require different components on the inside of the unit to make the pad work.