thx Chubby...i just taught it to my self i guess from seein how some folks did Main Lines and i wanted to use the bud sites and are there when ya pull the limbs out an tie em down..u can get more cola's in the middle area too...sometimes i just use wire around the edges of container an hook to lil holes drilled in top edges of containers.. and i also made some hooks made from pieces of coat hangers and make a curved end to stick in soil an around a limb to hold down..but these pics i was just doin a reg mainline style