Do you mount yours outside the plane flyinrog? If so how do you do it? Hard to judge exactly how bulky it is as I haven't received it yet. I guess having it inside the plane is pretty useless.
I was thinking of modifying the trainer with some sort of clear window and mounting the voltwatch underneath the window.
Any suggestions?

Also purchased a Dave Brown six shooter fuel pump, a Great Planes Fuel can setup and a new Hitec Servo for a spare. Gotta love ebay hehe.

Thanks for the replies everyone. Wasn't sure if I had purchased something which was useless or did more harm than good.