got my son an outcast and HPI kenblock. Ran the outcast Xmas day and it was great fun. He loves it and can wheelie across the Costco lot with ease. Backflips on demand and then whizzzzzz. Pinion missing four teeth - day one. Took to the LHS and they only stock hardened steel from - if memory serves me correctly -Robinson Racing pinions. Order arrives Tomorrow- in the meantime they threw on the 17T optional pinion so oliver could run it in yesterday's warm weather. Sure enough at days end - same thing - teeth missing. So tomorrow-we put on the hopefully final one. All our Arrma trucks have this Robinson racing pinion - annoying but I have no pinion issues at all. Good thing he loves his Ken block and we have others for him to run. Other than two breaks in two days - the truck is a lot of fun.