I am a heel striker who has had their fair share of injuries. I currently run in Kswiss blade light or Kona which are lightweight (250g), use these for ultras no problems. I know I need to improve my running form as I have Been told by a few people that I sit back ( sitting in the bucket). Whether or not I should change to forefoot i don't know and there are arguments both ways for changing BUT I do know my running form needs to improve. I am also a bit lazy and like to just go out and run rather than be spending the whole time thinking about form. I have some saucony fast twitch which I think have 4mm drop, also inov8 230 and new balance minimus with 0mm drop ( not worn NB for running) So should I just try running more in my fast twitch or try running in my new balance? Will they help me run with better form? Or do I need the newtons to help improve my form?