Some more progress:
Wheels on axles (not glued at the moment) doors added, started the turrets.
A quick jig to locate the holes for the axle.
The steps used to make the doors and as I only need 4 no need for casting; just assembly line work:
A pod bay for my Tachikomas (or cargo, or tech bay). Not really part of the colony but as I am making this versatile and I really wanted one...
And a service counter drop-in, for the survey office.
Cheers