Remixed the holder from slackdna so that it has a round base, my mini didn't come with a base and I use it often just sitting on the desk, the large antenna makes it dangerous and likely to tipping over.

The fit was perfect printed in PLA, I will print PETG later and probably add a small indent on the since I noticed the clip can act as a lock.

Most of the work was actually from slackdna, and I have to thank him for having such a perfect fitting model for the mini.

Update, added a V1.2 file with a small indent on the back that serves as a small lock for the battery clip.

Also added a 3mf file with modifier that changes the bottom of the print to have 60% infill, makes the print slightly heavier at the bottom, but it's a small change not really necessary.

Also printed in PETG now with really good results.