Really good writeup, but a better way to deal with a line over on your reserve would be to cut the offending line with your hook knife. If you've got your A-license, it should be attached to one of the straps on your harness, and it's the only reason the knife is carried - the rationale is that a broken line is less likely to deform the canopy and cause a spin than a line over. Student parachutists aren't given a hook knife, so in that situation pulling on the lines would probably be equally valid.
(Note - I only know about the UK, different regulations may apply where you live.)