Picked up a user grade #15 recently, but it may not be safe for use! After lockdown the silo doors remain somewhat loose, they jangle when you shake the razor. The problem mostly goes away with a blade in place, however you can still get the silo doors to lift a bit wedging a fingernail between the doors and the blade side fin. I've never had this problem with a TTO razor and never taken one of these apart. Any suggestions?