Sorry for the delayed response.
Temperatures outside vary, I'm in the midwest so season depending it's anywhere from -30s to upper 80s F. Inside at night is 50 and working time is 65 F.
The issue seems to have become a norm of sorts. Kind of just always there, worse now to weather changes I imagine.
It takes me about an hour to pick it up from manufacturer and bring it back here.
How long it sits outside depends on sales, the more we sell, the more I make, the faster it comes in. It might be outside a few days, might be a month.
Usually when I have to bring a pallet inside it means I need parts, so I do not have the luxury of letting it sit inside while still banded. Unless it happens to be on a Friday.
It's not terribly warped on the shipping pallet, I did see an improvement when I started removing the sheets form those onto my flat rack.
I do use a vacuum hold down, but it just is not enough for this stuff. It's a regen blower too, just spent a few grand on it hoping to never have any issues with this or sliding parts again. Naive I know. The parts vary in size, from a few inches by a few inches to h a half or whole sheet. The finished parts don't show the warp nearly as much, but I also bend most of them so that kicks it out. I am really surprised at how long it takes some of these sheets to actually be held down by the vacuum. A few times there was no changing it, I had to use my pressure foot, but still lost a few parts.
These are always going to be issues when we are pushing the max on machine speeds, trying to keep up with orders in the hundreds, if not thousands, and only getting a MAX of 24 per sheet. It can get crazy.