I now have about 10 flights on my Sakitumi-E. Line tension is really good. Goes where you point it. Probably the best flying airplane I own. Lap time are 5.1 seconds. Final set up is:
Sakitumi-E
Kit by Walter Umland
48 oz ready to fly
Wing span 55-1/2"
Wing area 621 sq in
Battery 2800mAh 4-Cell/4S 14.8V ProLite X 25C LiPo by Thunder Power RC
4 minute flight charge back is 1868 MHA
Motor Cobra 2826/10 KV 930
Prop 12 x 6 EP
Speed controller TURNIGY Plush 60amp
KR timer set at 8900 RPM
Lines 60"
PS at the end of a flight the battery is almost at room temperature and the motor is warm to the touch, not hot just a little warm.