OpenAstroTracker level options

"GPS and level holder" holds a MPU6050 and a NEO6MV2 (with the antenna stacked on top) in place of the original bullseye level. The front port is also just wide enough that I was able to hot glue a JST-5XH socket in. (Remember, the GPS doesn't need its RX line connected, and both units can share VCC and ground.)
Because I like to get things set up properly before powering on the tracker, "Front level holder" takes the capsule of a simple, cheap line level and mounts it on the front extrusion below the RA motor so you can easily level the mount side to side. The level I used is https://www.amazon.com/dp/B07RGBBN8V - the bubble capsule just pops out of the line frame, and then snaps into the printed part.
You'll need two M4x12 screws and T nuts for each part, as well as a pair of M3x12 and threaded inserts for the GPS and level holder.