Nysp I believe is custom wired, not so much custom board. Instead of the heads being wired in opposite pairs, they are side by side. Then with the unlockable full bar sync pattern your able to obtain their patterns like the slow flash 101010--> 010101
According to whelen 13745 there are 4 wiring variations- the standard, the Unicor, the Philadelphia, and the leader.
It appears the unicor is the california variant that has an input for a steady red and rear amber.