Ran into a slight problem in that Phobos pattern bolters don't fit well behind the ForgeWorld breaching shields. The clip gets in the way. At a guess, the Umbra Ferrox would probably work while the Umbra would not. The standard plastic bolters (Godwyn?) fit beautifully, but don't match the rest of my bolter dudes. They're [i]all[/i] packing the Phobos. While my solution isn't ideal, I think it works from a practical and "realistic" stand point.
Breaching Squad "Aerugo" is about halfway assembled and will follow the same pattern. My employment hiatus ends tomorrow so I'm not sure when I'll get back to assembly, but I'm still hoping to have the entire list assembled before Christmas. Wish me luck!