Door Stop with Smooth Bottom

This doorstop has a smooth bottom for use on hard floors. Based on Zemoj's DoorStopV4 which was designed for use on carpet. Apply a non-slip coating to the bottom for improved traction (E6000, silicone, rubber cement, anti-slip tape, etc). The spring loaded top and non-slip coated bottom holds the door and doorstop in place much more securely than a common rigid doorstop.

For reference, the doorstop shown in the sample photo is placed under a door that has a 27mm gap.

If you use this, please post a make with a photo. If you modify it, add your version as a remix. I love to see other people making use of things I have designed.