Thanks guys, I'm really enjoying working with the cataphractii kits, and despite fears of miscasting/bubbles across them I just ended up with a few minor bubbles in the top of my second thunder hammer. I ended up with 25 helmets and 5 unhelmeted heads so the squad leaders will be helmet less with the rest in helmets just to make the leaders stand out a little more.
I've finished the pads/head for terminator number one and primed the second but I intend to take my time painting the whole group given how much they've costed.