Concept 2 PM5 Device Vice

thingiverse

This tablet mount is designed specifically for a PM5, although it may also fit earlier versions. The jaw's capacity ranges from 3.5"-5.25" or 88mm-133mm in diameter. For smaller devices, the jaws can be trimmed to secure them properly. The hinge features interlocking teeth that precisely adjust the angle of the mount and is designed for tool-free adjustment. To assemble it, you'll need random springs and bolts, although a strong rubber band can also provide sufficient clamping force.