• Redesigned for 10 mm round wooden arms as this size was very easily available.
• Battery is held in place with wide zip-ties.
• Arms extend to center of the design.
• Uses Hobby King motors.

Here is my whole Hobby King order-list - just in case someone likes to have similar setup. With these components it seems to fly fairly well. Propellers should be 2 x push and 2 x pull but when I ordered these HK didn't have push propellers in stock.

4x #TR_P18A/4312 TURNIGY Plush 18amp Speed Controller = $47.60 1x #TR_PC/2169 TURNIGY BESC Programming Card = $6.95 1x #OR019-00501-3/8240 Prop Saver w/ Band 3mm (10pcs) = $2.86 1x #T2200.3S.20/8932 Turnigy 2200mAh 3S 20C Lipo Pack = $8.49 4x #AX-2213N/8622 2213N 800Kv Brushless motor for AXN Floater-Jet = $29.44 3x #HK401B/10113 Hobby King 401B AVCS Digital Head Lock Gyro = $35.97 1x #GWS-RD-1047/10055 GWS EP Propeller (RD-1047 254x119mm) (6pcs/set) = $4.82 1x #RBand-21M/11761 Spare Rubber Ring for Prop Saver (10pcs) = $0.99

(optional: "Open Source upgradable frequency hopping transmitter": 1x #TX-9X-M1/8991 Turnigy 9X 9Ch Transmitter w/ Module & 8ch Receiver (Mode 1) (v2 Firmware) = $53.79)

You need also KKmulticopter controller-board or something similar to keep the thing balanced.

Print, assemble, tune and hope for the best :)

Good luck on flying !