Someone asked me about this the other day, so I thought I’d put up a pic.
The DS tiles are on board that’s a touch over 2mm thick – perhaps 2.25mm. Hard to be precise without precision callipers.
The board I was measuring was a sample from the factory that has been approved by Mantic (and then “liberated” by me for this).
This first pic shows it compared to the thickness of the tiles in the original DKH. It’s a bit tricky to see because the DKH board has a rounded edge (due to the cutter), whereas the sample board is square edged. The new board is a little under twice the thickness of the old.
I don’t have a photo because they’re not made yet, but the tiles will be held together with transparent plastic H-shaped clips.