Hi Joe - sounds like you had vapor lock - my aerocarb did that once when it was warm - it stuttered a bit when oil temp was over 240 on a climb out - I leveled off and once it cooled to 235 it was fine. Make sure you have a fresh air cooling tube to a box around the gascolator and put fuel line wrap (red fire sleeve stuff ) around the line to the carb. I havent ever had the engine shut down on landing but it did while taxiing at Sun n Fun last year. I enrichened the mixture a little bit and it stopped doing it. The puddle of fuel was because of the short time you had it with the mixture on - no shut off. Carb heat is not installed on mine - but I suck cowl air anyway. I have also increased the air inlet size a little bit and made the air exit a bit bigger with a ramp. Also - are you running 100 LL or 93? It makes a difference. Another trick is to retard your timing about 2 degrees. 7 degrees static - 28 full. It allows the engine to run cooler - no noticable loss in power.
Just some starting points - if you need more let me know Bill - 41768
