Plumbing a slow build 4 is pretty much an on-your-own kinda deal and so I have a real simple question for you that have already plumbed your planes. What size grommet did you use to pass the fuel line through the side skin of the fuse? I just did one with a grommet that requires a 5/8" hole, but it occurs to me that this only provides 1/8" of rubber between fule line and skin edge. Chaffing seems unlikely since everything is rigid, but obviously this is not an area where you want metal on metal. The next size up that Spruce has would require a 1" hole, which seems kind of big. I know it's a minor detail, but I'd love to hear what others have done. Thanks people.