Any contractors or experienced handy men out there? Over the weekend I was working on a small project for a friend. I was hanging speakers from the ceiling and used expanding plastic anchors screwed into 1/2" drywall ceiling. The speakers are 15lbs each and there are 4 screws (#10 1-1/2") & anchors (these). I've now done a little reading and it seems this is generally not a good idea for heavy loads. My question is what is a heavy load considered? The load ratings I've found on these anchors says 10lbs, so I figure if the load is 15lbs distributed over 4 anchors, that each have a load of about ~4lbs. I'm quite prepared to go fix this, but was wondering if anyone has any thoughts. I'm all ears.