My first quadrocopter at all, based on released NG HW 0.22 with 1cm alu frame and MK center plate. I wrote a blog about the construction, you can find it at http://uavp.agner.ch.
4xTowerPro w25A with Quax Firmware
~900g (incl 2650mAh batteries)
Alu-Cross 1cm, with MK-Centerplate
Turnigy 30C 2x3300mAh, 1x2650mAh
Sunset flight at 19 july 2010