I designed this to hold the ImmersionRC 600mW transmitter to the side of the Phantom 2 so to maintain easy access to the battery compartment.
The transmitter case is removable for servicing (and is locked in with a screw) and additional cases could be made for other things.
The transmitter is held in place by slots in the case and is secured using the antenna connector (my antenna has an adapter)
Printed on a Makerbot Replicator using PLA
Printed the two leg adapters at 2 Shells, 25% Infill and at 0.10 mm layer height.
Printed the case standing up with the opening at the top and at 1 Shell, 100% Infill and at 0.10 mm layer height
You will need to remove the plastic wrapper from the transmitter for it to slide into the housing