Running the Novarossi Speeed/13 on low and no nitro

Question: Hello, I've been following your Novarossi Speed/13 engine here in the USA and was wondering how well the engine runs on no nitro to 5% nitro fuels as compared to the older Rossi 61 with the 3+2 porting?  I'm really looking forward to running one of these engines in my Classic Pattern ship, it's got all the markings of...