I'm going out on a limb here, but the controller mod(turn w/o throttle) rocks. I flew both my bipes and a jet up high and brought them home. My next plan is to figure out how to stunt the bipes. A 15w soldering iron is $8. A 10 packof the diodes is $3. On page 16 you will find the pic that shows you where to solder. I would recommend a mag glass, but I did the work without one. But I will probably buy a pair of glasses for my next mod. All purchases were made at radio shack.

It sounds like I'm talking ----, but I had both the jet and a bipe over 100 feet in moderate wind, and brought them both home.

Tim