I'll be messaging Rory at some point to enquire about them. I remember a post by him ages ago saying it can run in 4WD, or that could be his beetleweight controller instead. In any case, I'll be ordering two cheap eBay speed controllers (on Amazon ironically) to test everything out. My only concern with a dual controller is if one's damaged, the whole drive is gone, with singles they can easily be replaced. Though the repair offer is good to know. Thanks. I should be opening a build diary very soon so I can get some more advice as I go along. Thanks again.