I've have had great success with my PTS, and .46 Evolution engines, especially after removing those @$!#$ limiters.

The NX 1.00 has been a nightmare for me.

I've never been able to get this engine to run reliably for any length of time.

I've gotten quite good at getting engines tuned up, rebuilt, check out, etc., so much so that I am frequently sought out for aid with problematic engines, as I can typically get them running well...

Not so with the NX 1.00.

Pump, replacement tanks, header tanks, replacement carbs, stiffner springs, new heads, longer plugs, etc. etc. etc... the NX 1.00 has been a "deadstick king" for me.

Next time I consider an Evolution in this range, I'll go with the GMS 1.20 instead... much cheaper, reliable and more powerful.