Great work -- any more details on the shutoff valve? I bought a Gilmour one but it restricted the flow which messed up my attempts to use the "sheeting method". Does that one (looks heavy duty) give you a full 5/8" flow on both sides?
Was: 2008 335xi sedan 6MT Black Sapphire Metallic
Is: 2013 Fiat 500 Abarth Nero (black metallic)
Wife's: 2013 Infiniti G37 S sedan 6MT, Black