Yup, the test letters in the cylinder will be hard to read since they are pushing pretty far out of the main image plane, so if the test scene looks like the photo I posted, you’re good to go!
The retroreflector surface isn’t super delicate (i.e., you can touch it without damaging it), but it shouldn’t be cleaned with anything other than a microfiber cloth since scratches from rougher cleaning cloths/paper towels can be distracting when viewing the aerialized image. The warbles are normal and shouldn’t affect the floating image quality. Also dust shouldn’t affect the image quality, but may be bothersome - agree that the housing and beam splitter have a way of pulling in the dust. We’ve made some closed-housing holoplayers for installations, but they don’t fold up, so it was a compromise of portability vs. closed system. Happy to hear any thoughts on your dream improvements, which hopefully we can roll into a next gen system!
Great to have had you call into the meet-up!!! Looking forward to seeing your creations in the system!