No I fully got Doc's point. The claim and the summary statement from the movie served to reinforce his contention that hard money was scarce so in real life no one could ever have afforded a spare cylinder.
No offense Doc, but not well illustrated.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.