Certainly. Once you find the sweet spot. As with any mill, you will have to adjust to the outside elements. Temp, Humidity and Altitude.
The only engine that truly holds a tune IMO is an O.S.. Thats it. Everything else requires more 'at the trackside' tuning. Even an O.S..
The Picco is particular. But nothing that an experienced tuner would mind. I WOULD NOT recommend this engine to someone that is new to the hobby. But thats me.