jollies

hi would like all your opinions on using recycled tyres as speaker cabinets ,i have been using them in my mobile roadshow for a number of years now ,if anybody wants to view part of my setup its on youtube under recycled tyre speakers ,looking for help and advice to bring this eco friendly product to the next stage .just come back from the british invention show ,gold medal winner ,also patent pending .so lets have your coments good or bad,regards ollie