Simple Parameterized round turret

Experimenting in openscad to make a simple turret for miniature gaming. It is very plain, but I think it is a good basic start for a little bit of greeby application and some paint.

Parameter variables are hopefully pretty self-explanatory. There are 3 major sections: The barrel, the turret itself, and a base for the turret to sit on.

//barrel
$barrel_length is length of the barrel from x=0 and going in X direction
$barrel_diameter_base is diameter of barrel at x=0
$barrel_diameter_muzzle is diameter of barrel at the far end of the length
$barrel_bore is the diameter of the opening in the barrel (depth of bore will go back until it intersects the turret wall)
$shroud_backset is the distance from the end of the barrel to the end of the shroud
$shroud_diameter_base is diameter of shroud at x=0
$shroud_diameter_muzzle is diameter of shroud at the far end of the length

//turret
$turret_height is the height of the main turret body
$turret_diameter_bottom is the diameter