Not really 447,as long as you having fun and they are still working, good on you. BTW I'm a bit different since my tanks all paid for themselves long ago as I work regularly for a local museum where I set up a U-Drive for visitors. I also do kids parties, school fairs,team building,etc with my tanks http://www.yellow.co.nz/site/radioco...rty/index.html all my tanks have hundreds of hours running time I have only stripped one gearbox and blown a couple of flash units. Some tanks are 'mine' which I don't let anyone else drive!
Nev