Yeah, that can happen. I learned it from the Boro tank, that the bridge does not need to be perfectly straight to fire. I still prefer the delrin tanks as I'm often "on-the-fly" when filling to go.
You'll get an eye for the bridge as you continue doing it. You'll be able to tell if it's not lined up perfectly, just by how it sits at the top & bottom. I usually hit it straight each time, but once in a while I push it through for a re-do.
If you have one of those Battler thingies, it makes it very easy. If not, I recommend them. They're great.
