way back in the day, I had installed wiring passthroughs on both the left and right top corners of the firewall. I reasoned that I would use the one over the battery for all power and the one on the port side for all signal, p-leads etc.

Unfortunately, I didn't think to check my avionics plan to see where the wire bundles were designed to position all the boxes. What I'm left with is a situation where all the signal wires also need to come out the starboard side. I discussed this with various people and the general consensus was that I could probably run them all through the same hole without interference, but I'd be a test case because nobody does it that way.

I originally thought that I'd give it a try, with the understanding that I might have to undo some stuff if the engine instrumentation got wonky every time I pulled a few more amps through that main power wire into the main buss.

Ultimately I chickened out. The thought of having a major wiring redo and poking more firewall holes after I get into flight test was just cringe worthy, so I went ahead and installed another passthrough on the starboard side.

The plan will be for all power wires to go through one of these, and all sensor wires going through the other. The one on the port side will end up only having P-mag wiring and maybe a few spare wires for future use shoved through it. Wish I would have defined this better early on. Clearly, two would have been plenty if they were just in the right spot.