I've never seen drop levers for hydros and I don't know what it would take to make them work. Not worth it IMO and I love some good hydros. If you were good at building stuff I could see it being fairly straightforward.
Hmm... There was a Singular that had them, they looked normal from a distance but never saw a close- up. Only reason Im asking is b/c my hydros are almost brand new and I would hate to not be able to use them.