To add to Earl's great post, I can't stop myself from pointing out a few things.
The 160-170 pounds of string tension are secured predominately by the bridge plate glued to the inside of the guitar. Then there's the effect of the strings pressing down on the bridge saddle. There is some angular force to the saddle, pulling it toward the neck, but it's likely considerably less than the total 160-170 pounds of string tension.
If you think of the square inch or square centimeter value of the bridge dimensions, a corner gap might represent less than 1 or 2% of the surface area thats glued down to the top. I'd get nervous if that number approached 30%, but a few millimeters on the corner isn't a big deal.
With humidity changes the usually flat contour of the top will change, and when the top bows the stiffer dead straight saddle glued to it will lift from the top at the corners.
tl/dr - like Earl said, you're fine, don't worry about it you're fine, you got a long way to go for it to be a concern.
