First things first. Fly the heck out of the calmato 40 which is a good trainer. Many people try to progress to fast (you are already anticipating the next steps) so take it easy. The trainer will give you lots of experience for the next step. Computer radios are nice, and now they have them in a reasonable price range, but they are a convenience, not a necessity. After you finish with your trainer, you can still use the radio you have to take the next step. Ask this question after you have completely madtered this trainer.