Sadly, no ... flashify just uses your builtin recovery to do the flashing, it seems -- not much use if your inbuilt recovery doesn't work
I've also tried CM's flash_image via wireless ADB (the only way I've managed to get adb working), but that gives me a very imformative "failed with error: -1" on the recovery img files I've tried so far ...
Any other thoughts? Really don't want to have to go through the whole LG software restore and root again (if I can even remember how to do it after all this time ...!)
---------- Post added at 10:17 AM ---------- Previous post was at 09:56 AM ----------
Update: Flashify doesn't work, but Rasher does. However, now I need a recovery.img file that works (I've tried TWRP's official one, but that still won't boot -- I get a "boot certification verify" error on the boot screen) ...