Here's some pics of my install with my own tray. Plumbing is pretty straight forward if you just think it thru & colored air lines help. I have one large tank in the nose for the retracts & doors and a separate smaller tank for brakes. I use the sequencer so the doors shut when the gear is down mainly to keep grass out. No pic, but I have 3 Duralite Ni-MN batteries on a tray far out in the nose. The tray is mounted to the front fuselage former that I beefed up. Putting all that weight in just the nose cone and no support will crack it off on a hard landing. I'm using a Powerbox sensor switch for RX batts with JR 8611's on everything. Power is a Jetcat Titan with Tam's pipe.

If you are using the upgraded Robart main gear door actuators, you need to make a block to prevent the door rods from going over-center. In the pic, see the block above the mid-span of my actuator rod.