Scrambler j box/electrical hub

I don't have a file for my project, however I do have an example of what it is I am after and I also will do my best to provide a list of additional things need to be optioned/added to my example file to best satisfy my project's requirements. I am aware the circuit is very basic but I am more inclined towards the PCB for the space saving aspects than anything. All of the circuit components must be rated for 12VDC @ 10-15A. My circuit will be very similar to the attached file (nearly identical in design, as I have an all analog/some breadboard version of this proposed idea currently operational on my vehicle) with the addition of fused power supply outputs to the electronic ignition system, accessory power, both of which would be relay switched power feeds directly from the battery/charging system. In addition, the entire main power load would be switched by a relay that would "unload" the PCB with the ignition key in the "OFF" position. In addition it would be helpful for quick diagnostic purposes to have an LED indicator next to each of the board's automotive type blade fuses/circuit breakers. If possible to integrate a low voltage cutoff circuit into the board to maintain system battery voltage by intermittently shutting off the accessory power load until "safe" threshold voltage has been restored. The board will also be protected by an internal fuse on the incoming power. The addition of the appropriate output smoothing capacitors to the lighting circuits, which are all LED. A junction on the turn signal lamp outputs using diodes to allow for both the left and right side signal power illuminates the single dash panel indicator light without polarity causing L-R crossover. If any type of automotive or spade type connector hubs to accept wiring harness connectors can be attached to the PCB to make it more readily compatible with existing equipment it would be ideal. In addition I am curious as to whether or not there are risks if my intention is sealing the finished PCB in clear epoxy inside of its aluminum enclosure to improve it's weatherproofing as well as just to better protect and isolate it from the potential harm that can occur under the usual operation stresses exerted by a running and riding motorcycle.