So i posted the other day and on the printrbot sub and got a little help but not much. so now ive gotten the most up to date fork of marlin for printrbot and added in what i needed to and changed one of the numbers so it matches my rev D. the number im talking about is switching it from mobo 84 to 81. now though i have an error when i compile the code:Unknown MOTHERBOARD value in configuration.hdoes the newest version of this marlin fork just not work with older printrbots at all? if so how am i supposed to get firmware i can modify and make work with my new heated bed and e3d v6 hot end.this is very frustrating. especially because printrbot seems to completely have removed everything to do with the rev D boards from their site and i cant find much elsewhere except a hex file that i cant edit. http://ift.tt/2e2siGI