I poke holes around the upper rim of my smart pots and run string through the hole and around the branch to be controlled. I tie the string in bows, like a shoe, for easy adjusting later. Some strains I have had to adjust daily (DP, SLH, etc... for example) due to fast growth rate and/or stiffness of branches. To adjust, simply undo the bow by pulling each free end of string, adjust placement on branch (depending on how and where you want them) without relieving too much tension, pull tight (¡but not too tight!), and re-loop your bow. Boom, you've got a Sensai (Sinsemilla Bonsai).