Are there any possible downsides for using it on DBV? I was also wondering if all custom spherical flavor disc wands can be used with dry herb i.e. can they be used with a screen in them or do they only fit the flavor disc for concentrates?
No, it is not possible. The DBV only comes with the conical wand. The SSV uses it because it can use the hands-free attachment. All custom spherical flavor disc wands use a screen, unless they are built with the all glass screen, which you can also put a screen on top of.
You do have the option to trade in your DBV towards a SSV, if you really like the spherical heater cover style. You would receive $100 credit. Here’s a link to learn more.