The third company of my Eagle Marines Chapter still requires some of the models to be touched up from their days as 'Eagle Warriors'
It was the third addition codex which introduced the force organisation chart and all plastic miniatures were introduced. Most of these models are easy-assemble plastic models from the time. The terminators are mostly my own from the second edition Space Hulk box plus five more I picked up of ebay more recently.
The characters in terminator armour are metal and were originally on 25mm round bases but as there were too 'top heavy' they were re-based to the 40mm bases when they became the standard. However, now there is the 30mm base available they may get re-based one more time so they fit better into the late 1990s era of the force.........