I have a U-Can-Do 60 size with a YS-91. It will fly slow, land gentle, etc. But, it is built to fly, not to crash. Most decent trainers are fairly rugged, and will stand hard landings, dragging wingtips and the like without much damage. Do those with a UCD and you will most likely have a new kit without and assembly instructions. And since copters do fly differently, even if he is an excellent pilot, it might be best with less plane til he gets used to it. There isn't much doubt that a good copter guy hasn't got the skills, but ouch the noise of crunching balsas...

Larry