Join Date: Jan 2007
Location: Home of the Hawkeyes
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A shorter lag screw won't provide any more holding power, it's more a factor of the amount of material the screw is threaded through. Other than increasing the amount of metal that has to be drawn through the blocking material if things let go, the extra length isn't doing anything.
If you want to make your mount virtually immovable, put the two togglers in the upper corners of the mounting plate, two lags a quarter of the way in from the sides, and two lags in the bottom corners. The togglers would have to pull the blocking through the drywall to fully let go. Just make sure your toggler bolts are long enough to reach through the drywall and 2x4 blocking enough to let the toggle rotate into position. I'm assuming you're using lag screws at least 1/4" in diameter with a pilot hole of appropriate size.
Last edited by weaselfest; 07-31-2014 at 04:42 PM.