That sounds right. My original idea was for the “Biker” to have a d10, but it’s probably better to keep all the “base” Classes d8 and under in Hit Dice. That establishes a certain baseline with regard to power level for the regular game. The “Empowered Person” and “Kung Fu Fighter” Classes are above that baseline, especially in combat.

Will the “base classes” use d4-d6-d8 only as in the Player’s Manual?