I just realised that the Dorsal Anti-Collision Beacons were supposed to be light red, and not the 'normal' red that I had been setting them. Judging by which ships have light red beacons and which ones don't, I guess I forgot somewhere between starting the Commando class and finishing the Commando class 8 months later.
D'oh!
Fixed.

Removed "margin" tags from class & reg displays (accidentally left in after copy-paste from another build); changed registry display text colour from black to grey; closed stern access shutter (ramp).

Updated - better thrusters; better paint job; made 2 person; added Shortcuts & Signals HUD; better landing gear; removed purple Dorsal Nav Lights & Formation Lights ("purple for dorsal" no longer part of my Flight Regulation Lighting).

Changed the shade of green used on the Starboard illuminated Orientation Panel because the lighter green that I was using was indistinguishable from yellow when next a yellow Ventral illuminated Orientation Panel.

Retextured and recoloured.

Edited textures to match the more up-to-date Mentee variant.

Texture changes - specifically a decision change regarding which textures should be used for floor and ceiling that includes illumination. Plus replacing the old "vent" textures which has changed to no-longer have vents to one that has a grill and replaced texture on Orientation Panels.