This is a 120mm version of the Zappy 100, with 2-hole motor mounts and lugs for rubber bands. It is "universal" in that it will accept 16x16mm or 20x20mm esc/FC.

Quick specs:
Weight: 4.0gm
Frame size: 120mm
Motor mount spacing: 9mm
ESC/FC hole spacing: 16x16mm and 20x20mm
Motors: 1102/1103 recommended
Max prop size: 84mm (3.3")
Arm width: 2.6mm
Frame thickness: 2mm
Motor screws/FC/ESC holes: 2mm
Motor center holes: 3mm - refer "Additional Description" below.

Ultra-lightweight 120mm frame with super narrow arms. Very quick and extremely agile when built light using 1102/1103 motors, 300mAh 2S 45-90C Nano-tech battery, and a lightweight esc.  

The performance from high-Kv 1103 motors is astonishing and their light weight (3.6gm) ensures this performance. It needs to be stressed that the lighter you can build this frame, the better it will perform.

If you want to use 1104/1105 motors (or bigger), the 3mm version of this frame is the one to choose. It weighs just 2gm more but has more strength for the heavier motors.

Frame (rendered):

Pic of a Zappy 120 2mm frame with BR1103B 10000Kv motors and 3020 props. The quad weighs 28.0gm, and 45.4gm with a 2S 300mAh 45-90C Nano-tech battery. Esc is a BS06D 6A weighing 2.4gm. It is incredibly agile and has very good flight time.

This "true x" frame is cut so that the grain of the carbon fibre sheeting runs down the length of the arms, rather than the conventional layout which has the grain running at a 45 degree angle. This dramatically increases the strength of these super-thin-arm frames, and requires a different, less efficient layout for AP to cut the frame, and thus is more costly. We consider our frames to be premium and cutting-edge, and that the extra cost of these unconventional frames is justified.

The motor center holes may be too small for some motors and might require countersinking, or drilling to a larger size, just enough to relieve any binding. Please check the circlip is not binding as the motor is rotated by hand. This is done to maximise the frame strength in this area.

For more information visit:
https://www.rcgroups.com/forums/showthread.php?2883082-Tweaky-the-people-s-frame-and-its-variants