Warped Bed Question

its been over a year it looks like, still holding up decently? have you done any high bed temp prints (my bed temp for petg is around 70-75c) to see if that affects it? also what about some kind of thread locker to help hold the screws? or maybe thats too much overkill?

can confirm, this method works WELL. as you can see in the photos, im at .087mm and started at .654