Just started breaking in my Tower .75 glow engine. I've run about 16 ounces of Wildcat 10 % nitro, 18 % oil (syn/castor blend) through it so far. I've been using the method recommended for ABC engines...e.g. run full throttle at slightly rich setting folloed by a cooldown and then back to full throttle running slightly rich. My question is I'm showing about 12,000 rpm using a Master Airscrew Scimitar profile prop 12x6, and I realize that I'm not running at normal lean so it will run faster..but I know that I'm pretty close to full rpm. Is 12,000 about normal with this engine at this stage in break-in?? Can I expect the rpm to come up with furthur time?? Let me know if this sounds about right, or if this engine should be turning faster........By the way I'm running with a 2.5 inch plastic spinner on also. Thanks.