I hope to run my Nosram 4.5t with my Novak GTB. I am hoping all will be sweet as i have never run a different motor with it. It has only run the Novak Velociti 7.5R, hope it will be compatible and maybe a bit more smoother power delivery. Dont think Modelsport will have many motors left now. I told them i had advertised the discounted motors on a forum and asked if they would supply me with a 16T pinion free of charge for the extra work i had drummed up for them and guess what they obliged, so thanks very much Modelsport!