^^^some reviewers think they can suggest changes to a mod manufacturer when it is basically already the finalized production model. unless the masses cry about something needing to be changed (like the early Vt200's brass 510 fiasco)....it ain't getting changed. that is the final production model of the VT250, love it or leave it.
I bought one of the first Vt200's with the brass 510, having had quite a few mods from China with brass 510's previously and with no issues i saw no problem. And just as i thought well over a year later i have never had an issue with it at all, as long as you treat your mods with a bit of care instead of cack handed all will be good.