Over the course of the last couple of days we have spent the afternoons removing the rear box but retaining the centre resonator of the original box. More for a better sound than any noticeable mechanical advantage. Several videos below show what she now sounds like. This was done with 2.5' stainless steel tubing, TIG welded pie cuts into a 3 inch splitter with twin 3 inch slash cut tail pipes so as not to dissuade from the original Cooper S aesthetic