Since the complete set came in a huge suitcase style box and was difficult to carry I created a all in one solution. The base game and each extension has their own layer so that there is no confusion about which part belongs to what.
I used 8x2 mm magnets in the four corners to connect the different Layers such as these: https://www.amazon.de/dp/B0CPJ1GJKS?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
Thats just a gimmick not necessary.
The author marked this model as their own original creation.
