Yepp, thought about other possibilities like it having beenresting on the bar below the drain bolt, but this screw has no corrosion so... Slim chance of that one. It was a little low i got about 1.2L out so maybe this screw has to do with leak? Just though of that ome haha. I filled it with 1.6L and drove about 30 miles on the highway last night it shifts smoother for sure.