I just outlaid what I thought was a lot of money on the Vortex X10 CDI unit & it is unbelievable! After reading peoples opinions on this forum I made the big decision & purchaed it & put it to the test last weekend. It was powerful before the Vortex with all my mods made so far but now it is just an animal! Pulls like an absolute steamtrain & I love the traction map setting which helps out heaps in the soft beach sand & trails I ride in here in Oz. Well worth the outlay. Cheers from Oz.