I've got most of my tools and parts for my first project building, and now my mind is wandering towards the next. I was thinking a 6 inch long slide using a 6" Les Baer Monolith Heavyweight slide, doing the entire thing (no, really, everything but the grips) in Severns customs hard hat finish and putting either a Clark Custom or a Aristocrat sight rib on it. This one is a ways off, but needless to say, 45 just doesn't cut it in this thing. What caliber would you guys recommend? Like 10mm or 460 Rowland (which is involved in my current project), or similar cartridges. Thank you.