A simple impression tray holder that can accommodate 3 trays at once while the gypsum is solidifying. It features a long base, ensuring that the entire device won't tip over when it's fully loaded.

I made the slotted grooves tilted backward at a slight angle of 2 degrees, so that the tray wouldn't easily slip out when it was filled with plaster. That's why I printed the model on its side to avoid the "staircase" effect on the slope.

I used a 15% infill to give the model some "weight". You can print with any infill you deem appropriate.