I'm enjoying using the thick Posca pens in the Grey Book - limiting tools to just two thick markers really speeds up your sketching - with the building taking maybe 20 minutes to complete.
A quick lunch sketch on Federal Street of what must be the last old resident. Looking a little out of place next to new architecture including the Sky Tower along a little further.
And on the left a rendering experiment of a moulded plaster 'modillion' that I picked up in Buenos Aires years ago.