Here's a tree for a visual of the different structures I'm talking about. The difference again between both is what clause the clause [in support of which one of the following hypotheses] modifies.
I am foolproofing 1-35 PT LGs at the moment and doing some drilling in LR and RC as well as going through the CC on Lawgic, etc. If you get a general study group going, let me know. I am interested