To drill the rest of the holes in the firewall I had to remove the engine mount. It has only been held in place temporarily, since I knew I'd have to remove the mount to finish.
Finished drilling the holes for all the items I have on hand. I have a couple of relays coming in the next few days (master relay and starter relay), so I'll wait to get those and install them before permanently attching the engine mount.
Installed the smoke oil tank, smoke oil pump and ground bus.
The ground bus is a "forrest of tabs" where everything grounded can go to. I have a duplicate forrest of tabs on the other side of the firewall, both joined with brass bolts. There is no need to isolate the bus from the firewall. Most airplanes use the metal airplane as a ground path anyway, so there is no need to isolate the bus.
Also sealed around the cabin heat box.
Engine mount detached for access to the firewall.
Added the ground bus below the orange coils.
Upper left = coils. Left = ground bus. Center = fuel. Right = smoke tank & pump.
