Nice one Reecey87, simple but effective!
Hope for you the 5mm thick rubber does not have memory when being rolled up for too long. But at least it's heavy enough to not blow away in a breeze, thats a plus.
That's the reason i'm printing it on 510gr pvc with ringed holes on all four corners for tent pegs.
I'm looking into small sandbags for on the corners in case the ground is to hard or paved.
Thanks!
I initially thought the same about the rubber having memory so ive done some tests with it rolled up over some time, when I unravelled the mat it instantly sprung out flat again. Seems to react well.
I could also punch some neat holes as an option in case it is a little too windy.