Hey Green, I am also growing the LSD strain so I am also interested in what you find out. I topped mine last week and am in the process of trying to get it to root. I germinated the seeds on the 20th of December so they are just over a month old. This was taken a week and a hlaf ago, just before I topped the big one.
They look nice ad healthy Mine are around 5 weeks or so. I'll be cloning it tomorrow. It already has a nice bit of skunky aroma going. From what I can tell from researching other grows... is that it will about double or slightly more than double in size.