Thanks for the information. Which engine would you purchase? The plane has an empty weight of 17 lbs.

My tendency is to try to carry more fuel rather than less.
I would fly in the U.S. so the thrust needs to be less than 17 lbs. Is there any benefit of JetCat over PST? PST 600 versus 600R is there any real difference? Different compression ratio or just tolerance for RPM? The 600 has 5.5 KG of thrust, the 600R 6.5, is this just from better balancing and tolerance for higher RPM or is there a difference in the compressor or turbine?

What do you think of the AV8R verus DV8R?