it sure was a pain in the ass to build that small, but it was pretty fun!! the charger (controller) has a built in cut off, i dont think its very accurate as far as peak charging the cap though... can a cap form a memory like a battery as far as charging and discharging goes? ive read a forum about some guys changing to a micro lipo and getting 10 min flights with the stock plane, or using the guts on ultralight indoor planes (read carbon fiber tubes, and saran wrap). i might try that, or i might wait until i get more experience with lipos, as im a newbie to that voodoo..lol.... i thought briefly about building a sub micro rigger, but my gorilla hands wouldnt be good in inclosed spaces such as that, and i wouldnt know what to do for a prop, how to build a drive, how to hook the drive to the motor shaft. i was thinking a wd40 straw for the drive tube, and i dunno what for a driveshaft...i was thinking shrink tubing the driveshaft to the motor shaft, and using ca or locktite also as a precautionary measure. then the real hard part... how to make a prop..... and what to use thats powerful enough to turn a water rudder.... dunno, but one project at a time,huh?