Im also doing a perpetual semi-SOG with my Blueberrys. Ive played with every type of lst , topping , supercropping, etc. Straight colas are cool, bushes take longer to fully ripen and take WAY longer to manicure. Im getting the best results (higher yield/quicker ripening) by rooting the clone and topping her as soon as she takes root, I give her a week to recover and then through her into flowering; after the stretch I transplant and bury her up to the split. This produces 2 main colas that mature fast with almost twice the yield of a single stalk, yet take up half the space of a shrub. It looks like two plants sharing a pot. My OGs are TOTALLY different. I top them every third internode and keep them super-shrubby with a long veg and tie them down real good before switching them over to bloom. It all depends on the strain and growing method. Topping them early DOES cause them to produce smaller leaves , and I think that's a GOOD thing, because I have severely limited spaces with TONS of light in them.