I completely agree, I run a J1300R and a J1600R both with Xicoy ECU and both converted to Kerostart by PST.. They are amazingly smooth, powerful and RELIABLE engines...
PST do A LOT of research into their production, and in fact are running the J1600R ( PST Own Design ) with an AFTERBURNER on one of their military projects.
http://www.youtube.com/watch?v=KgPhOzmpREk
Brilliant Engines.