I have spent the last month converting all my rotostart engines into pullstarts cus the rotostart was doing my head in (basically i got bored of charging the batteries and one of my rotostarts chewed a cog up leaving me car-less for a day) Now im converting them all back cus no matter how carefull with the pull starts they either snap or start fraying the cord and i cant be bothered to keep rewinding them. Im getting a heavy duty roto start (probably be a drill) which should sort out the battery problem and im never going back I HATE PULLSTARTS!!!!