U2fast,

I didn't want to just jump in on this one like the typical sales guy , but seeing as no one has answered your question yet I wanted to let you know the PST-J600 will be approved hopefully by late November. I am busy working the engine's application now and the demo engine is already in the US. Its a 13lb engine also heavily based on the MW-54, as is the Mamba with the exception that the PST has electric auto start capability rather than air auto. There are a number of engines already flying in most parts of the world today. Weight is ~2.2lb with starter, max RPM is 160K, and intro US price will be $2100+shipping.

Thanks,
Kelly