Speedrun Genetics are phenomenal. Your plants are really looking good and will yield mightily. Wait til you see those buds swell in weeks 8 through 10. I haven't grown the Sour Black Cherry (but have about 20 seeds) yet, but have grown Golden Gun and Frosted Cherry O's F3 on my last winter run, yielded almost a full lb between the two. Here is a photo of them both GG is first, FCOF# behind almost twins.