Only tested with gmb 1.1.8
Small Parking4 upgrade with ability to increase/decrease left filter number (from 1 to 4) and leave of sidebar option.
I work with this layout several month ago and, for me, it matches exactly to what I want, so I stop my work on layout.
With 3 filters on left :
With 2 filters and context panel on :
Very nice... :) I will try it.. :)
Tell me if you want improvment or if you see defects.