Smoggyboy,
I have never owned an ASP 4 stroke but I have a half dozen or so Saito's and they all run very well on 15% fuel. I find I get a smoother idle with the 15% as opposed to 10%. As for the glow plug, I have found there is only one plug to run in any 4 stroke and thats the O.S. type "F". The first thing I do when I get a new engine is remove whatever plug is in the engine and replace it with an "F" type (unless of course it's an O.S. engine, they come with "F" type plugs installed). Good luck and have fun with your first 4 stroke. Chances are that once you run it for a while you will do what I did and sell all your 2 strokes.

Steve