Re: What do you think of these?
My KM vase is air tight, I'd be more worried about threads stripping etc.
More parts doesn't mean better whatsoever. Just more things that could break, more things you have to clean and the more possible it is for the parts to rust.
Not sure what you mean by the placement of the holes? If it's what I think you mean I'd still rather the stem just be one solid piece.
And yeah, glass IMO is just glass.