Flint,
You need one more barrel set. Pick a caliber, and add barrels cut to the Ejector Housing. Talk about a neat short gun!! After building a "Basic" Open Top set with .45 Sch, .44 spl and .38 barrels, I got out the hacksaw to make some "specials."
Cut to the Ejector Housing, the barrel winds up 4 7/16, and talk about balance!!! WOW
Fun Guns. Most versatile in CAS.
Coffinmaker