Yep, as @Steven_Hines mentioned, Grey v3 and v4 are identical side for a change in one of the component suppliers. You can mix these safely and read more about some of the recent reformulations here.
Yep, as @Steven_Hines mentioned, Grey v3 and v4 are identical side for a change in one of the component suppliers. You can mix these safely and read more about some of the recent reformulations here.