After painting everything, I got the tank tray installed. I used Locktite blue on all the bracket bolts and hoping that prevents anything from backing it’s way apart. Will watch everything over time until I get confidence in how this self-designed project stands up to time. When the paint on the carriage bolt heads inside the tray dries fully, I’ll be able to drop in the tank, add the fittings and mount the water pump. I’d like to shop around for a deep cycle battery before I make any final decisions on location. The concern is how the battery and water pump will be protected from damage from debris bouncing around on the road.