Here is the first print of the lens holder.
It still needs some cleaning up, but it looks like it should work well for testing.
The lenses I am using are 7.5mm 0.5mm pitch threads. While not in any standard sets I was able to find a tap on amazon for a reasonable price.
The pointer lenses will fit in between the lens holder and the illumination board. Some experimentation will be required, but I hope the lenses will be held securely without any type of glue.
STL files will be uploaded once everything is ready for a beta release.