So much for my technical thread...
I have a concept in mind for a plenum with a removable top so that the runners can be easily changed out in a matter of minutes. This could be useful for tuning purposes, or for changing them out for different needs - short runner for drag, medium-short for road race, medium length for aggressive street, and long for everyday driving. Diameters could be changed too. That is for way later though, and it may be cost-prohibitive.