I've started cutting out parts for the rifle. Will post pics when I return home this weekend.
In the mean time I have thought about making bullets for everything, and in the novel Nemesis, by James Swallow, he describes the vindi as loading a .75 Cal bullet into his rifle..now that's the same caliber as standard bolter, which i was a little surprised at because I would not have imagined them being the same (with the rifle being larger than a boltgun round). I've designed one in illustrator that I will make a prototype of soon. Making one any larger than that will probably just look too ridiculous.