I have a tip for all those out there using a docking mount for a home application. Using the docking connector for the audio works fine, but it isn't the best solution for power supply as it thinks it is in a car so me solution is to take the audio out with the docking connector and for power use the empeg power supply thread it through the hole in the back of the cage. Then tape a stiff piece of wire (i use a bike wheel spoke) onto the wire just behind the plug and then and then when you slide the empeg in it pushs the wire through the hole. stopping it from snagging up.

I have fitted docked ethernet which is quite easy by fixing the wire but not the plug so it has a little bit of freedom to wobble. If wanted i could post some pictures.