Love the show.
However, on the current episode Tickle and his group are shown modifying and then pressurizing a beer keg with CO2 gas. Once a pressure vessel has been cut into and modified, any pressure rating that may have been authorized is then null and void. Thus, pressurizing with a gas is dangerous; a potential bomb. They could have performed a test with water to a pressure that is 1.5 times the intended operating pressure (suggest holding for at least 15 minutes). If the keg fails with water (or other liquid), no one would be injured. If it passes . . . go for it and make the seltzer!!
The show should make a safety statement.