Buddy Box!!! Kinda sort of. Mostly. I built A two channel Cub 1/2A and an instructor got it up in the air then handed me the TX. When it was out of fuel and getting close to earth he landed. Then I went onto A trainer with A buddy box then after solo I started crashing them allby myelf. Not really, I have busted A few but I have crashed very few of them over the years. I instruct today with the buddy box, it's just so much easier for A new pilot.