Door threshold / bed siderail for RV teardroip trailer

When fitted with a full / custom mattress sitting in a doorway of the teardrop tailer might have the following issues:

• it is not that comfortable, as the mattress slopes out under the body weigght
• bed sheets etc tend to keep get caught in the door

This simply mounts a standard 1/8 aluminum bar on the inside of the door, then uses snap-on 3d printed pieces to support the legs while sitting in the doorway, without cutting into the flesh.