Not a bad idea, looks like several airplanes that will need tubing so a roll may be the way to go. Kept out of direct light it has no shelf life. Hydro, I’m a bit surprised you had to go to large tubing. My YS 115 engines would suck down 6oz per minute at full throttle with medium tubing. Probably has something to do with the large bore carb and only using pipe pressure?