Put up drywall and 2 of the sheets don't mesh very well, there's about an 1/8" or 1/4" gap between the 2 sheets. There are no studs close enough to the seam of the drywall, so I can't insert any more screws to close the gap. Is there a "trick" for getting 2 drywall sheets to mesh together if studs aren't available? Thanks so much--your help is invaluable.