Took me over a year to get this right. Its the Duomei Ry4 that's the magic missing ingredient. If you have Duomei Ry4 do yourself a favor and try this. Its fine off a shake and vape but is STUNNING after a steep. I only did the copying of this as its no longer available anywhere in my country. Would not have done it if I could just buy it as it was really , really hard to get right.

And no you cant substitute any of it except , maybe the Holy Ry4 which can be swapped out for Ultimate Ry4.