Sepquential LED Tail Light Problems....

[70TWO NOVA]

Ok so I purchased a set of Spaghetti Engineering Sequential LED tail lights for my 72 Nova about a year or so ago. After I installed them (followed instructions to the T) I had issues with both LED boards blinking randomly. I called Spaghetti and was told that they had one other set do this and to just send them back so they could solder in a "voltage filter". They told me to check my alternator also to make sure it wasnt putting out any AC voltage, which I did (it was fine). Well I got my boards back and they still did the same thing. I called Spaghetti back and they said they thought maybe they just werent getting a full 12 volts and the boards needed full 12v to operate properly. Well at that point I ran a wire strait to my battery (mounted in the trunk) and that fixed the drivers side board (but killed my battery from a small draw all the time) but the pass side still does it. Im lost at this point and havent been able to drive my Nova for a while because of this issue and also had to purchase a new optima battery from the lights draining it so many times. Also I have a set of thier front marker LED boards and they work perfect, I dont get it?
Anybody else run into this? Have a remedy for it?