Brother bigben
I thing it should be hobbypro not a hyper pro. and I used it before.
For my comment is don't waste money for trouble shooting.
Directly to buy a O.S. engine lar...........
I want to ask... is the fitting of all .15 are standardised??
e.g. if I use a HPI engine mount for my MT2, can I play a os engine on the engine mount???