I safetied the fwd inboard fuel tank supports. The bolts go into a nut plate that comes off the inboard tank rib. The shank of the bolt rests in a horizontal slot in the steel bracket coming off the fuselage. This bolt doesn't get torqued, just snugged down so that the washer will no longer turn. The idea is that during a crash if the wing gets bent back, this structure will pull apart and not yank the end rib out of the fuel tank. But because if the way it's put together, it needs more safety than what's just provided by it sitting in a nut plate not properly torqued down. The assembly print have you safety wire the head of the bolt, but really don't call out a specific dimension on where to drill the Hole for the safety wire to run through. I just followed standard industry convention with edge distance and so forth and ended up with a number 40 hole about 3/8" from the edge of that tab, which is gobs. After that was done, I bent up a trial fuel vent line out of scrap to get the bends and leg lengths right. Note that the assembly print calls for the fuel vent fittings at the wing root to be pointed forward and reflects a vent line routing up over the forward tank attach bracket because of that. In my case, the brothers I bought the wings from had oriented those fittings down. If I followed the suggested routing, my fabricated lines would immediately have to do a u turn back up, then fwd to clear coming over the top off that bracket structure. Thats seems like a lot of additional bends and unplanned low spots for water collection and whatnot. It's just a vent line, so as long as it doesn't get plugged or chaffed somewhere there isn't much that can go wrong here, but I spent quite a bit of time investigating this to make sure I wasn't missing anything obvious. Depending on whether you have aerobatic flop tube pickups or not, there are multiple suggested routings for both the fuel intake and vent lines. After reviewing what other folks have done, I elected to go under the forward tank attach bracket with a much simpler run than what would have been required to go over the top or through the bracket lightening hole. It's her to tell in the pictures below, but there's about 1/2"-1" clearance between the vent line and anything else in there.