You're right. The DX5e throw switch doesn't do a lot for this plane. The seller told me that, even with the 'exponential' on his expensive TX, it was hard to control the roll on this extremely cute, but increasingly irritating little plane!
I think I might have to break down and buy a 'real' transmitter. Maybe...
I will have to wait for a warmer, windless day to try it out. Not too sure I will be successful indoors at first. Too much for my already frazzled old nerves.