terrible grinding sound

[ReV:-O]

its not so much the noise level im concerned about, its the amount of friction. With my e-revo, the gears were mod0.8, and it would freewheel for quite some time. My hyper hardly freewheels at all, theres a lot of friction.

I had a look at the gears on the HPI Vorza, and the pinion's look like what i should be using http://www.hpiracing.com/products/en/100915/

they say 1M, is that the same as mod1?

cheers