As I intended to use Efke film, scoring anything was out 100%! This emulsion in this stuff is like half set jelly! I tried glue but teh stuff kept coming off or not setting (wrong glues I guess). I bet with 99% of other films, the runners would not do any harm. With the efke, it had removed all the emulsion in two line!
Yes temp drop is an issue. I started at 20 degs ambient and then increased temp (when times became silly) just to get some constrast from the duff film I tried to dev. I was pretty sure that I was not going to overdevelop so just went for it on temp and time. I have never produced such bad (flat and shadowless) negs!