The base is a 3x4 plastic construct using the WHFB basing kit. Gaps in the border and gaps between the 20mm bases were filled with P3 modelling putty instead of squadron white stuff - easier to work with, better at filling large gaps, and far less smelly. I then used a good sized file and put a thin coat of white stuff over everything to smooth it all out. The base then was covered with the same terrain as I've been using plus the barrel and 3 cannonballs from the WHFB Empire cannon plastic set.
A couple of side views:
The crew was constructed on the same general principle as the last one - a mix of Nuln and Kislev type figures with some amount of kit-bashing.
The commander is a Mordheim Kislevite - I had one too many for my 28 man bodyguard, so I transferred this fellow to the artillery. His left hand is the unique feature. The match is the match from the Empire plastic artillery set, but that match is held in a right hand on the sprue. I cut the match away and glued it to a left hand taken from the Empire Militia/Free Company box, specifically, the hand holding a bow. The angle of that hand allowed the match to be held at an angle that approximates someone lighting off a cannon.
This fellow is a metal figure from the old Empire metal cannon set, painted in the livery of the City of Nuln.