I think people get to hung up about bowling quick, I am about medium and can through down a good fast delivery, typical full toss in-swinging. Works almost eveytime aswell as does the faster bouncer. It's about getting right length and line no matter how fast you bowl if you can't get it in the right areas your rubbish. I am 6'4 and do not have a blistering run in or run up just flowing run-up and flow through the crease, EG ever tried bowling with eyes closed and found the right point of release(doing it over 50times), very helpful. I open our bowling attack yet a medium pacer, its about consistency, i do know if i bowl short of a length i am in for a whipping.