Halcyon, If you have a good idea of how your line is run, bend up a tool to lift the lids on the junction nodes, take some pictures, then close it up and move to the next one,
On my own line 50m and 900m up the street there where 2 junction boxes sealed by tape and a shopping bag, emailing through the images lead to a 3 week turnaround to fix compared to 7 months i was originally given, bumped me from 2mb to 1.5MB, which i would call a success, still ended up going to cable for 100/12 speeds, as i was still being effected by the rain.
Note dont touch anything in the pits, that would bring some legalese into the mess.