so we got a zenith 1 from one of the members of the local A club, i tried it right away and it fell on its face if i gave it throttle which i was told it did. I tore it down and soaked it in carb cleaner besides the valve under the fuel adjustment needle which had to be drilled out and luckily was able to be removed with an ez out after a 2 day soak. one thing im kinda worried about is he said the car purred when it was parked a year ago with the down draft and that the carb he gave me idled fine, but with either carb the car misses like crazy. im starting to wonder if theres something else going on. we ordered one of those new zeniths from snyders that has been "air balanced" to try to eliminate some guess work.