Quote Originally Posted by Dustin B View Post
...Does the new heat bed having a built in relay make this mod not possible?
Can you provide a good picture of the relay on the heat bed? If it is a mechanical relay, you'd have to either wire that relay so that it is energized all the time or jumper across the contacts for that relay. PID requires the use of a solid-state relay that can be switched on and off much faster than possible with a mechanical relay.