RE: Evolution 60 NX in a 40 size case...
Uh-oh! Incoming!!!
There are two subjects that one never talks bad about on RCU. They are Saito and Evolution glow engines.
I like Sanye engines, generally (the makers of the Evolution glow engines), but I can't stand the Evolution two-stroke's twisted cylinder fin appearance or their high prices. But that's just me.
No, I haven't owned one or seen one fly, other than my Evolution 26 GT gas/oil engine (an MVVS). I do not doubt that they are capable engines, however. After all, my ASP and Magnum engines run just fine, so the Evolution engines by the same manufacturer should run fine too.
Ed Cregger