I was looking for an accessory to mount a microphone on my camera. I choose to use the standard mounting platform for camera and simply add a screw (buy anywhere).

To have a good precision for mounting it and have simple part to print, I think it's better to thermoforming it rather than build a complex shape layer by layer.

I needed it for a microphone but it can be used for others accessories...

I choose to build it flat and thermoforming it. With a hot air gun it's pretty easy to form and weld it (around 240°C or less).

http://www.youtube.com/watch?v=oALpKrW_Sw0