Great info, thanks all. At the moment I have three planes, all different cyrstals. 36 (Trainer), 27(Tuncano) and 52 (typhoon), three tx's. I might be able to find a used Tx on ebay for the price two receievers and Cyrstals. One TX is the parkzone that came with the typhoon, the JR for the trainers and all old tower hobbi that came with the Tucano. It would also be easier to have to charge just one tx battery instead of three, well, except for the park zone, it takes straight up double A's batts. I know the hobbico receiver will not work with the JR. Actually I suppose I could just swtich out the receiver in the tuncano to a JR or hitec. Park Zone TX works well. The JR Tx have will allow up to three model storage (if remember oorrectly, don't have the manual in front of me)