Hi Solara, i'm using the standard m05 gearing i only have 3 options on gearing and i'm using the 20t pinion. I'm pretty sure the ratios are the same as the m03. I'll be trying it without boost to start with and if it can handle the power i'll try a little booost I just want a starting point for the esc settings then i'll go from there. I had a little go last night but the thermal protect kicked in after a couple of mins. I'll get the settings and post up when my friend brings my lcd box back.