If I knew anything about electronics before building this I would have known that 16 AWG is too thin. The build instructions do not specify, but show using the speaker wire that was referenced in the parts needed. Which was 16 awg. Literally following instructions can get you in trouble.

Colin says I can double up the two ramps power wires and fan on a connector then have the heat bed on its own.

Picking up some 12 or 10 AWG on way home from work and will see if it works.