Welcome to the forum Bushhog and congratulations on your new 313!
From what I understand, the TVs lift straight up, with some pressure, off the stand. You can go down to the Tech Corner and ask Grand Design`s Customer Service.
Yes, the first time they are taken off the holder, it can be a bear.
I couldn't get mine off. The dealer finally did.
Try doing it with 2 people, one on each side, both lifting up and "wiggling" it a bit.
Although I would highly recommend you have the dealer do it, in case something breaks.
Once you get them off once, they are easier the next time.