I was looking at a GWS pico or lite stik, or a Wattage mini max for my first plane. Because I am soon to move to an area with numerous soccer fields and such within walking/biking distance of my house-to-be, my airplane is bound to be of the parkflyer/ultralight variety. For reasons of price, size, and flying area, these appear to be the best choices for me, although I am open to suggestions. I intend to purchase a hitec lazer four radio transmitter, a cirrus 16 gram narrow band reciver, and two of those 9 gram servos commoly found on ebay. However, I do not know what to use for the speed controller and battery. As I want to be able to fly for more than 5-10 minutes, I intend to purchase some lithium batteries, or possibly use re-worked Qualcomm packs. However, I do not know what to use with these planes in the way of voltage or number of cells, and do not know what to use with them in terms of a speed controller. Just a thought-Could'nt I use a Zener diode to shut down the motor when the current drops below 3 volts? Thank you for your help and support.