In the last week or two I've been strategizing and scheming, mostly about how to run plumbing and wiring FWF without it looking like a total rats nest. Was planning to just wait until it was done and post a bunch of pictures of the finished product, but there are getting to be enough details that an interim entry or two is probably in order. First things first- Not exactly fuel lines, but I decided that in might be handy to have some extra wiring through the firewall in case I want to add electric cowl flaps, temporary sensors; whatever. To that end, I ran 1/2 dozen wired through the power wire passthough and terminated them on each end in a wedge lock deutch connector. you can see the fwd end in one of the pix below, zip tied to the engine mount right below the battery. The other end is tied up behind the sub-panel on the starboard side. I started routing sensor wiring, which necessitated locating where transducers are going to mount, which necessitated finalizing plumbing routing to the transducers. this is a real chicken and egg scenario. After several iterations, I had some idea of what might work, so I mocked it up with vinyl tubing from the hardware store. I'll order the final version from TS flight line in a day or two