Hi Guys....Ok, I've narrowed it down to these 2 engines: OS-12CV-R, or HPI Nitro Star Pro 12R...I was told that the HPI is made by Rossi, looks like a nice engine, a little more power than the OS, 1.25 hp verses 1.0 for the OS...I can get the HPI for less than the OS....Any opinions?....Coop