I managed to catch a power cut!
Unfortunately one modem dropped out soon after(S.Step), and seems to be banded or something along those lines as it didn't sync at max with no cross-talk.
The other one is holding on at 0db with max sync(S.Step2), will DLM punish me for my sins.....
The line was at 57mbps before so 6db of margin gave me 22mbps.