Rick,

You may want to ensure that AM radio is OK for planes. I believe that 72 Mhz FM/PCM is the designated band for aircraft and the AM (which is currently in the 27 or 75 Mhz frequencies) is primarily for surface vehicles.

Take a look here: [link]http://www.modelaircraft.org/comp/frequency.htm[/link]

I don't profess to know for sure - just suggesting that you ensure that you can safely use that radio. If not, then you'll need a new one anyway, and you can get a buddy-compatible unit at that time.

As far as your question goes -- I don't think a buddy-box is absolutely necessary, if the instructor starts you out 3-5 mistakes high and you stay up there. It does present more risk - but the more practiced you are (simulators are great way to go) and slow/smooth on your reactions, the risk can be mitigated. I practiced a lot on the G2 simulator and did the hand-it-over method on my first flight - no problem.

Regards,
MrJB