Thank you all for comments most kind..
Woody, we can at times never or not know exactly where we come up with a design from, it is often from something we have seen at some point in time.
Bryan, very fussy indeed ..
...
Pete, feel free too as I can't lay claim as to copy right. As for brittle no more than anything with a thin wall, if cut or broken clean in half as not to have the chance of cracks and not overtightened on the jam chuck, things are fine, John's comments lend to possible problems.
John, in the other thread "something different" I mention as to how these came about, the clean straight break, which gave the cup form, it is the truing of the rim and centering where in it's hoped to get an even skim cut which as you found gives nice finish, profiling a base to fit the cup is interesting, but once done an glued together gives a means of holding to sand the inside, fitting back on the jam chuck you can then do the shaping of the stem etc. It can be noticed that this one did not glue up true with the cup... a slight case of time and rushing ..
... Just stand as is, no hanging involved.
Cheers David