I'd be more concerned over bolts or screws holding the mount to the wall or ceiling. Your mount should have a load capacity on it, have a look at projector point site as the mounts give load capacities and the epson is around 7Kgs.
I used to have my projector on a shelf above my head until one night i heard a strange noise behind me then got hit on the head by the shelf and projector due to screws being too small

, my only thought was thank god the bulb didn't blow, then noticed the blood, lesson well learned, you can hang off the new mount