I'm actually going to dust some lower buds with Stone Dragon male pollen. Then I'll grow out the F1s and back cross into another BTS to get a 75% plant, then do it once more to get an 87% BTS 13% Stone dragon. I actually have 4 seeds, so I could even go to 94% if I wanted. I might buy some silver thiosulphate (STS) and self one at some point as well, but I like to tinker with breeding and I'm ok with males. BTS is the best nighty night strain I have - and I LOVE Stone Dragon at night - which speaks pretty damn highly of Mephisto's creation.