well I have a pair of dbl het yellow/orange hypos at the house that i picked up from Jason last year....he produced dbl hets from different hypos lines 2 years in a row that were supposed to compatible...But your right BT i have no idea what im talking about....And as ffor the yellow being uncompatible im talking about grazianis line...not the bells line which started out as the butterscotch,but like the nerd line green has been called something different than what it started out being...