Iris quadcopter long legs (Picatinny rail)

Long legs designed for mounting on a Picatinny rail as used on the 3DR Iris quadcopter. Two files are provided: a mount and a long leg. These are separate to allow each object to be printed in the best orientation for strength.
For the Iris, these legs should give about 150mm clearance under the body (plenty for a Tarot or similar gimbal)
Sketchup file is included in the downloads so feel free to remix. In particular the mount can be easily adopted to attach other items to the Picatinny rail arms.
Update 19 July 2014:
Added a "springy" leg option originally designed for my T Copter series. An example can be seen in the later part of this video.
Update 26 Nov 2013: Added another style of leg - triangle girder-type construction. This leg is much more rigid that the flat one which might be preferable.
Update 27 Nov 2013: I realized that, unlike the flat leg, the triangle leg could be printed in one piece. Also a short mount still attaches quite firmly so I've included a Tr iLeg v2.stl and updated the sketchup file.
Update 30 Nov 2013: Version 3 of the triangle leg is 20mm shorter and has a bit more bracing where the leg meets the mount. These legs weigh less that 6 grams each (plus another 2 grams for nut and bolt if desired) ...that's about 1/5 the weight of the genuine 3DR long legs.