As a quick aside, I have been basing lot of different things for my Rogue Trader era Traitor Legions and today I have been assembling and basing Robots. I had already based the Cataphract robots, but completed the others, and thought I would share.
The rules and artwork were first released in August 1988, and later re-printed in the Warhammer 40,000 Compendium.
In the rules, robots are organised into Maniples of four of the same type of robot, plus a Techmarine for the whole Maniple.
Here, from front to rear, I have a Maniple each of Crusader, Cataphract, and Colossus robots.
They are all based on Citadel round 50mm bases. I think this gives the miniatures a little bit more room to look better.
These are a close combat robots, armed with powers sword (located in the arms I assume, I never really knew), and normally a Las-Cannon on the back. However, mine have the Heavy Bolter option, which given their anti-personal role, I think suits them better.
I intent to paint them in the Crusader Khornate colour scheme of red and black in the artwork behind them.
The Cataphract is described as a general all-purpose battle robot, and the mix of weapons, bolter, flamer, and Las-cannon, suggests that.
I am unsure of their eventual colour scheme as there was no Traitor colour scheme for Traitor Legion Cataphracts. They may end up as part of the Sons of Horus and so may follow their armour colour, or I might use the generic black Traitor colour scheme in the artwork.
I have shown the front and rear views here.
These are described as siege robots, and the big siege hammer as the left arm helps reinforce that idea. They are also equipped with ta bolter on the right arm, and a rear mounted melt gun.
These will be painted in the Colossus Khornate colour scheme of red and black in the artwork behind them.
To replace the weapon mount I added a lance from the Rogue Trader era Juggernaut kit, with an idea to add banner to it later on. I didn't bother to try to add a Melta gun somewhere as I thought it would detract from the miniature, and as it's a conversion, people would be aware of that it should be equipped the same as the others in the Maniple.