OK, well it took nearly 5 hours, but the ECM structure was finally repaired and I was able to avoid hostiles long enough to get the POS and that structure out to my LowSec base. Best part was running the repper AFK for the last hour before downtime, knowing that this morning I could login and finish it up. I suppose I was lucky that no pilots came into the system and probed my POSprey, but I valued my sleep more than the remaining goods. ;-)
What a pain, but happy that I am not abandoning the POS (and of course the 100M replacement savings).
Off to my RL TODO list, but online tonight to see if I can scan a good LowSec WH entrance...