RE: am I LoCo?
I put a OS.32 in one and it runs in the high 120s. It was kind of a clumsy build in the turtle deck, cockpit area. I built the fuselage thinner than stock, but the wing was built stock.
As a low winger with a high thrust line, hand launches always try to zoom for the dirt and I've piled it up a few times. With a rolling take off you shouldn't have any trouble.
I think your biggest consideration will be getting a 6 ox Jett tank squeezed in there.