Fabricated two new 1/16" bus bars between the contactors in place of the original 1/8" one I made. The thinner ones are easier to install/remove and are narrower so there is less chance of a short. Installed cotter keys on rudder pedals. Installed one of the pilot master cylinders to test the operation of the spring return. Measured battery height and marked areas on the firewall that need to be clear to allow the battery to be lifted out of the battery box. Test fit the engine mount to look for potential places for firewall feedthroughs. Looked at pictures from Brian on locations he used for feedthroughs on his RV-7A and decided to match them. Decided not to add feedthroughs until after the instrument panel is installed. Measured wires in the harness that need to go through the new feedthrough and found I needed a 0.56" hole. One 1/2" EMT conduit fitting is 0.63" and is barely large enough. It might be better to use two of the 1/2" or one of the 3/4 in to allow more room for additional wires or to group them better. Decided to move the rudder bar assemblies to the center mount point after I make the spacer to limit side to side play so I only have to disassemble the mounting blocks one more time.