After many, many revisions I present my take on Josh3D's doorstop. It is designed to snap into place without any intervention and can be released with one foot.
Printed using PolyTerra PLA, 10% infill, 3 walls at .5mm extrusion width, solid infill every 38 layers, 1.5mm thick top/bottom shell, but honestly it should work fine however you print it (this just makes it stiffer.)
CAD: https://cad.onshape.com/documents/c6f8c5284a743d60816dbca7/w/7829b16297af2ad59552a99f/e/3b3324ad276a7e93613402c2?renderMode=0&uiState=64966395e6d97e19253f6bbd
Leave a comment if you'd like any modifications. If you liked this model post a make it would make my day!
The author remixed this model.