I have decided to have a custom gun built for me by a local builder. Questions, I'm 99% sure of a 54. Caliber, my next dilemma is length, 38,42,44? Definitely a swamped barrel, but also which make? Getz, rice, colerain, buckeye? What type of rifling, radius, square etc.... I'm just looking for opinions, and people with different preferences.