It’s a valid issue. I’ve found that some of my old PG stock is a different thickness than my latest order. I’ve re-sorted my stock so that I’m using up the older stuff before the new stuff. Figure the latest stuff is more likely to be what the sizes will be in the future than the earlier stuff. Up until now I would just put my latest order on top of my existing leftover stock. Now I’m rotating it.
It’s been an issue where something I did awhile ago wouldn’t fit tightly or was too loose. Started remeasuring the material and noticed there were differences in the 1/8 stuff vs original medium vs latest medium for instance. Hoping they’ve stabilized with the latest manufacturing.
Oh, and it’s different for a given size between material - medium Draftboard, maple, cherry and walnut ply are all slightly different. Gotta resize the project file if a tight fit is required and I switch between materials.