Yes it can be modded to feed off both tubes instead of just 1. You will lose your reserve but it flows twice as much. It requires some grinding on the petcock with a dremal, and making both filter tubes the same length. Somone might have a pic of the mod, I don't.

when you do this, do you turn the petcock to the on position and drill out the plastic closing the fuel off? Will this make it impossible to shut the fuel off? If someone can give a clear description on how to do the petcock mod it would be greatly appreciated.