I know this is not the right form but I need opion's fast. I went to @#$&$%$# kits, and I'm confused. Is the dissolving solution in the kits a combo of BA & BB or just one of them. I know some say it's better to buy BB and BA and do it your self, but for what I need to research the premade kits are ideal. One of my conversion needs both, and another just needs BA.