I'm a little confused about the first statement in the OP about the toolbox. I'm currently on Liberty, which has a toolbox. Do I need to SBF before installing or not?
No. I assume the Tranq devs include the toolbox in /preinstall or something (which means it will be automatically installed until removed from /preinstall which an SBF will do).
From Liberty, you do not need to .sbf, but you WILL need to wipe cache/data.