Hi Emanuel. I tried your solution with my scrum teams. We introduced a rule that all stories had to be less than 3 days dev work. This improved our burn down chart but it didnt improve it enough to avoid the end of sprint crunch. And splitting stories this much started to create fragmented work that was hard to co-ordinate and integrate. Plus it was hard to demonstrate value from tiny things. Our teams decided it wasnt worth the overhead of making the stories smaller than 3 days dev work. So we moved to ScrumBan and got very relaxed about allowing stories to start in one sprint and end in the next. This was a far superior solution. You should try it and see.