I run just the cap with the gasket and store the filler separately. Curious if you guys have or have thought about adding a threaded opening in the cap to accommodate the smaller filler cap that normally attaches to the end of the filler tube. Thinking that would make venting the Rotopax a little easier. Or maybe your working on a vent insert that could be added to vent and speed up the flow filling like the old gas cans.