I`m all for lipo and im looking forward to giving them a run at the worksop series but i have to agree with some of the posts regarding being able to fit into all cars without hacking bits out of them. A manufacture should not forfit sales just because battery technology has changed and this could happen. I would hate to see the racing scene lose a tope end chassis such as an S4 just because it could not accomodate a lipo pack