I might might have a couple or 16 i lose a count depends whether the wife is watching. I keep seeing them at auctions going cheap and then feel sorry for them and buy them.
In my experience you need two to get a working set but they are superb. They need a well sharpened saw i prefer them rip filed or near enough with very little set.
I fing the bigger stanley ones very taxing to work as the saw is very heavy and as such a smaller millers fall is my go to mitre box.
Personally i tend to use them for smaller pieces and complex angles and a powered mitre saw:
a scares me
b takes up space
c makes loads of dust and is noisy.
There is also virtually no guarantee any parts are cross compatable, i have quite a lot and very few parts seem to match in virtually identical mitre boxes.
They are remarkably hard to find online outside the US as i think there is little tradition here for them as we have the wooden mitre box. The saws need looking after and there are a lot of teeth to file,
People seem to loose the saw, the boxes are cast iron and hard to post. They are heavy to take site to site...
Probably the main point is that the NOBex are quite light, pretty good and have a replaceable blades ( no sharpening).
I do have an ulmia i am doing up, seems well made but not to the quality of the millers falls etc however first opinions can be deceiving
owen