Finished up the passenger last night, giving him both a missile launcher (for the h-k) and a stormbolter. I also adjusted the lascannon mount; the gunner fits far better now.
The stormbolter/h-k combo is a little much on one guy, so I think I’m going to give the stormbolter to the driver. Otherwise it’s just down to magnets and details at this point. And I’ve got lots of ideas for fun details.