Check out Zahntech far superior product. Google the name they
are out of LA. I have one of their machines it has a larger box and
you do not have to replace filters or consumables other than
distilled water. I did a ton of research before buying mine and
they had the best unit out there.
I have been looking at lasers at shows for years, and was coming to
the same conclusion, among other things because they have a ceramic
chamber it is not damaged in use and does not need replacing as
others do. A note is that in discussion at a March show in New York
they were thinking about stopping selling to jewelers because their
industrial sales were so strong, and the time and effort needed to
sell to jewelers was much greater than that needed to sell for
factory and production uses. (jewelers apparently complain about the
price, haggle, etc while the big users just write a check for
multiple units at once), not that I, alas, can afford one.....