I’d caution you to be really really careful with testing out your Core with this stuff. If you aren’t already aware, people are frying the speed sensors in their Kickr Cores left and right because of simple ESD, rendering the trainers useless. I can’t imagine that Wahoo would honor a warranty replacement if you hooked up a power supply other than that which came with the unit.
Anyway, that’s something to consider. Much more here.