Yea, I know if I got them would need to add longer screws. Ok yea as I like the idea of the 6000 for long runtime. As I will, be mainly running on tracks or clubs races.. worse comes to worse later On I can buy a hardcase.. thanks... so Most clubs arnt too picky.. but obviously bigger races and BRCA ones.. not question you need hardcase. But at the moment not get intention of doing big races as Its mainly for winter.. fun cheers