Originally we had horrible problems with engine whine on TX with the Motorola remote mount kit. However, their newer version has addressed all of the engine noise issues that I am aware of, and they have been working great so far. I did notice that the back light will not get as bright as it would if it were direct mounted, but it is still bright enough to see at night.
The fire department had similar noise issues with an aftermarket dual head kit. On top of that, it tended to lock up the radio at the wrong moment far too often. We ended up reverting it back to a single head, and used the Motorola kit. No problems with programming either.
Good luck with your project.
~WEC
