I just ordered two Red 05 "B" bipes from KB.The three 06 red and black and green and yellow bipes I bought from TRU did not work or would run on thier own.Bad luck with the 06 model.The 05s, especially orange "Cs",are getting hard to find.I wish someone would sell replacement planes sans tx.I can't see being without 3-4 operating AAs as they are as much if not more fun then the big ones.I wonder what the upcoming X-mas season will have in store for us?Also if I can get a Silverlit Picco Z at Radio Shack why can't they stock X-Twins (AA Bipes)?