@tandar
In case anybody else reads this thread
In the process of upgrading my trinus to a more modern control board i have evaluated the options for adapting the bed and chosen what in my opinion is the most simple and straight forward
The mod is reversible but does require some wiring and a thermistor.
Hope this helps
Kodama heated bed mod
While the board i have is slightly newer than the OP's they are compatible with each other
and the Panowin Kodama & Bardo boards so the wiring / pin outs etc should be identical