To late I have already tested WT308. Actually it works fine. I mean the engine doesn't look like restricted and response is better. Now I need to do it for flying - I just tested it "quick and dirty" just to see if it works. I need to redo the throttle arm, fuel pump pulse supply, and the entire adapter (the white one is to much abused). I will also try to modify fuel pump cover where the priming bulb used to be so it will be smaller for better fit. This will take me few days between painting my house so be patient waiting for next report.