After some research I am working on a new design that uses 5v for the panels instead of 12v so it makes powering the boards a lot easier with just very basic components and no 12v boosters. It does make the LED PCB a lot harder for me to build, but I think the benefits are worth it. I am also changing to the atmega chip instead of the arduino nano so I will not have to buy nano boards and the 12v boosters which should help with possible stock problems as I just found trying to get new stock. From your point of view it all works just the same with the same functions and working with the old ELA cable. I am just about to test a direct replacement for the original ELA with the same 5v connector that goes to the old HAP PSU so no more separate power and date leads and most importantly no crimping of the 9 way molex power splicers which I absolutely hate doing.