A few years ago I found the drain plug on the right fork was stripped and was able to "carefully" drill out and insert a Helicoil.
I've drained them a couple of times & the insert continues to work fine.
The forks are off the bike, in pieces and being rebuilt now.
I putting in Race Tech springs & Gold Valve emulators.
I'll find out soon if the Helicoil continues to be secure.