Fuel pump mount for the Subaru H6 in my RV-6A

The Eggenfellner Subaru uses two fuel pumps. One for the primary fuel feed and a second backup pump in case the primary goes out or gets clogged. The system uses a pressure switch to sense if the pressure drops to a certain threshold and then switches to an auxiliary pump.
My setup has a pre-filter before the main fuel pump. It is T'd off before this filter to the aux pump. The reason for this is that if either the main pump or the pre-filter get clogged, the aux pump can draw fuel before either of these items. Also, each pump has a dedicated output line going out and past the firewall. This was done so that if a fuel leak develops after the pre-filter, I can switch over to the aux system and completely bypass the main line. Check valves will keep the fuel from flowing back in to the main line.
There is also another fuel filter in the engine compartment just before the fuel rail.

I designed the mount so that the pumps and filter can be removed as an assembly for easier maintenance.

Here's how I mounted the fuel pumps in my RV-6A

(Click on any of the images below to see a larger version)

I started by coupling the output lines to the pumps. The T in the upper line is for the pressure switch.		Then I added the input lines couplers and started bending the aux pump input line.
Next came the fuel pre-filter. It is mounted to the fuel pump bracket with an adel clamp.		Lastly, the primary fuel line from the pre-filter to the main pump was bent and installed.
Another view.		Test fitting it on the tray. The tray was made from .050" aluminum. The end plates were installed to support the lines and to make this an assembly that can be removed as a unit for maintenance.
The end plates.The big holes on the right one are to lighten the tray.		Lightening the main tray.
The is the forward floor. I temporarily installed 2 3/4"x3/4" .063 aluminum angles to mount the tray. These will be permanently mounted once everything is plumbed up in case a positioning change needs to be made.		Fitting the tray and drilling the holes for the mounting screws.
Here, I've installed the nutplates that will hold the pumps in place on the tray.		A top view of the empty tray with the end plates riveted in place.
Everything installed on the tray.		Another view.
The pumps were mounted on rubber isolators.		Tray installed in the airplance. Once everything is plumbed and finalized, I will fabricate a nice tunnel cover for all this. There will also be a vent hole in the floor.
Closer view