need help with this one.

So I thought I finally joined the club. As I was bragging earlier in this thread about having my original floats with 1000 hours. and they weighted less that 6g per set. Well within spec. and working fine. The other day on a flight I felt a little shudder in the engine in cruise flight and the smell if fuel. OK I know what that is. I got it to do it again on the runway after landing. So I removed the floats and weighted them just like before they weight good on a calibrated reloading scale. 2 @ 3g and 2 @2.8g. So I checked float level it was in spec. I could not make them over flow with the electric pump on at 3 psi. So thought the mechanical fuel pump was having short burst of higher PSI than it should . I never caught that on the dynon. My fuel pump(newer style) had 700 hours on it so I replaced it. No good same symptom's. Ok now I replaced the float valve and float bracket and the floats. Then set level to spec. I also replaced the diagram's all though to old ones looked good, No good same symptom's. This is a totally intermittent problem . The one constant is it happens after I have been flying for between 30 and 45 minutes No other time. After I get it back on the ground after this happens I can get it to really drop rpm and shake like **** with fuel smell and fuel on the drip pan. So where do I go from here. I am beginning to think its not a carb problem at all. It seems to be heat related . It always starts and runs very smooth and the carbs are in perfect sync. I am wondering if maybe an intermittent loss of ground on the ignition system after warming up?? This would might cause shaking and vibrating that makes to bowls overflow causing the fuel smell and bowl overflow. So I saved my original floats with 1000 hours. I never replaced them for fear of getting bad ones like many others on this forum. Any ideas guys. Thanks Brad Stiefvater Salem SD n124bj first customer built 12 to be airworthied and fly maiden flight 9-20-2009