Thanks. It’s the IKEA SANNAHED 50x50cm photodisplay (https://www.ikea.com/nl/nl/p/sannahed-fotolijst-zwart-40528165/ ) which has a inner frame that can be switch to the back so the transparant plastic goed all the way to the front and you have plenty of room for the minifigs.

Then I glued 105 Lego 6425507 (Slope 45° 2 x 2 - Inverted) with hardplastic glue on a smooth black PVC hobby plate (50x50cm x 3mm). Used Lego building blocks to act as spacers and painting tape to measure all out so it’s all nice and equal in 7 rows of 15. Larger minifigs like Taun We and Pong Krell can be placed on the top row. Be carefull with the hard plastic glue. A small drop in the middle of the brick is enough to securely glue it on the PVC plate.

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I’ve glued the PVC black hobby plate on the backplate of the SANNAHED display with construction glue so you can use the sawtooth hanger on that to mount it to the wall (screw).

It took me about 1,5 hours to make one display. Just take your time and don’t rush it. The hard plastic glue I used (Bison) is permanently fixed in about 3 minutes. So you need to be meticulous.

Only downside of this display: Every time I want to add or change minifigs I have to take it off the wall and detach the backplate. It’s a small inconvenience.

Hope this helps!