I've messed with TQs in the past, they're a pain unless you can get one in perfect shape and the ones worth running were made over 45 years ago at this point. I agree it's a better design overall but they are pretty friggin complicated compared to a SD. Look at the name of this carb anyway, Street Demon. The target market is owners of old cars and trucks with near-stock engines that only see WOT once in a while who want something that will bolt on and work OOTB and get good gas mileage. My setup is on the edge of being fit for its intended application, 222/226* @.050" on a 110 LSA cam with only 9:1 static compression, open-chamber heads and a cheap shitty loose 2600 RPM-stall converter. All things considered it works pretty awesome tbh and I have no complaints other than the fuel curve at WOT which isn't that big of a deal. I don't see how the air valve dashpot would be worth the trouble on this carb anyway the reaction time when opening the secondaries is at least on par with AFB-style carbs I've run if not better.