Very interesting indeed, I was employing the idea myself our Jack was definitely around this area where Flower and Dean street were myself. Fascinating stuff! And thanks for the extra information here too.
I have been a member here for a couple of years and only posted in-frequently due to time constraints, so still relatively new around here so do please forgive me if I'm miles out here.
Having followed this link here and looked at the map attached, it would appear clear that not only is Flower & Dean street clearly central to all of the scenes but so is the Ten Bells Pub!!
I have searched the forums and have not been able to find any references to the landlord John Waldren. Correct me if I'm wrong, but surely someone based so centrally, running a pub frequented by a number of the victims, could be worthy of investigation in terms of suspects?
A poster named Colin plotted the sites before and found that a centric point would be the Victorian Home For Men on Commercial Street. There are a few quasi suspects that lived there at the time, I believe Daniel Barnett, (Joes brother) and George Hutchinson were 2 of those.