Well I do have growing experience with scratch building shotguns from the frame up. My LC Smith project is 2 years old and coming along. Since I am approaching the time when I attempt chopper lump barrel making and case coloring, I decided to bring along a Stevens 335 to get everything working first. It was an early 335 frame with the water table broached through at the breech, and I mistook it for a 325, which MIGHT have fit my barrel set. The top lever was the give away--the 325 has a center screw, the 335 is solid, but I learned that somewhat later. So this last week, I made a set of wooden "try barrels", fitting them with extruded aluminum lugs and a bite, and these last few days I jointed them to the frame just to get in a little practice. Then I will use them to get a buttstock properly fitted up, and I will use them to get the forend iron made (if necessary) and fitted. I will short chamber them (so as not to accept a real shell!) and vent them out the barrel tops to get the frame working with real primers once the parts are all in and fitted. This is not the cheap easy route by any stretch, but hey, I am retired and there is no better way to gain a complete understanding of a certain design, and the parts chase is always fun and interesting.