Received the Enya 46-4C that I mentioned a while back - Its an older version and does not have the AAC construction that was mentioned before, Just conventional ringed piston in a steel sleeve. Very neat design. I have always had a soft spot for Enya's as my first RC "ride" was Enya .09 Powered.
Put it on the stand and did a quick test on glow - Having second thoughts on a conversion as it runs very well and is well behaved on glow. Has a very unique carb design (air bleed idle) that has a Choke function that operates by pulling the barrel out (linear) - it "Resets" the fuel slot and allows a large passage to the bore for priming - Very effective. I read they like smaller props than a typical 4C and this proved out - Spun a 10-7 at 11,700... Very smooth runner also.
Will have to think on this one for a while..