Thanks a lot for the responses Jeff, Jeff and Benny and thanks for the links Benny...I will take a look. I never battle mine, and to be honest they just sit on a shelf for 99.9% of the time...but when i do give them a spin around the house I like the idea of a more realistic throttle response (for want of a better phrase). As you guys say though, they are dirt cheap and seemingly worth a go. My Tiger 1 already has a gear reduction system so perhaps the turnigy doodar will be even less evident...one day I might understand this stuff LOL

Thanks again - i really appreciate it