thanks alot time pilot all of you replies help me so much. I do have one more question i just bought an eps 400c power syatem an i noticed that the shaft takes a bigger prop then the 300 that came with the plane. i bought it because for one i cracked the hell out of the plastic on the 300 and couldn't find the replacement at the hobby shop. so can i get a stronger prop or will the weight be to much for the plane, because learning to fly i break alot of the gws props. and it came with just 2 wires to connect the system to thespeed controler can i just cut the wires off of my 100 power sytem i have here and hook them up the the power system so i can connect it . and also i have noticed looking throught the forums that some people have the power system upside down does that make a difference or should i ut it on like the manual says to.