Started populating the engine sub-systems like the ECU and fuse box. My first "Dang it" moment came when I looked at where Kitfox suggested mounting the ECU. Right where I had already mounted my battery backup on the left equipment rack. An alternate was to mount it on the right equipment rack but my VPX was mounted there. The solution was to bend up a mounting rack where I could place my ECU over the top of the battery back up. Got one bent up on the brake, fitted it on the left side and then got it painted. Once it has had time to dry, I'll get it installed. Installed the fuse box on the fire wall which went well. Wiring in the X3 power connector has some pretty healthy Molex pins and my first look at a tool to work the Molex pins with 10 AWG wire was going to be a $500 bite. Luckily I found a set of jaws that work in my crimping tool and worked perfectly with the pins. I installed the clipping diodes on my master and starter relays which will go a long way to extending the operational life of those relays. Have been wrestling with where to mount my ground forests. I wanted separate ones for the avionics and for the lights/shields/switches. Finally came to a decision, mounted them and then began populating the lights and shields grounds.