This bracket is inspired by the SQM mounting bracket available from the developer of the SQM series, Unihedron: https://store.unihedron.com/products/sqm-x-ta

Although inspired by the Unihedron bracket, and with many of the same dimensions, it has an important extra function: to hold an iPhone and SQM-L meter with a fixed alignment between them, so that the iPhone screen can be used to assist aiming the SQM at the zenith. Also, like the Unihedron bracket, it allows the SQM to be fixed to a tripod or monopod. It is especially useful when used with the free iOS app SQM Mobile. Here's the link on the US App Store: https://apps.apple.com/us/app/sqm-mobile/id6753923113

As well as the 3D printed part you will need: 2x #4 x 1 inch self-tapping screws, countersink heads 1x 1/4 inch UNC nut (which is the correct size to accept a standard tripod screw)

To fix the bracket to the SQM-L you must remove the 2 case screws by the battery hatch (furthest from the optical end), and use the 1 inch #4 screws to fix the bracket to the SQM-L. The 1/4 inch nut is a pass-fit into the hexagonal hole in the base.

There are two pegs which can be used to fix an elastic band in place which can secure the iPhone in place. I have found that the small elastic bands used to bundle asparagus bundles here in France are a perfect fit, at 5mm wide. But in fact I don't use such support as it's easy to hold the iPhone in place by hand long enough to make the measurement.

I've also found that a monopod is quick and easy to use. A tripod also works but is more cumbersome to set up.