Hello, I’ve been using regular DB2 shells to hold the power connector onto the REF0 and REF1 and they come loose when I mess with the units. I’ve been looking all over today and can’t find the specific shell type that I need to use to clamp onto the DB2 connector. The REF0 and REF1 have small round discs that probably use a shell that is more of a clamp opposed to a screw-down type. Where can I find the proper Db9 shells? Thanks, Jerry