IF there are no leaks in the bags, the rear end won't even sag for a couple of weeks, maybe more...
You can get the tint off yourself... Get a bottle of windex, black plastic trashbags, and paper towels. dDuring the hottest part of the day, you will need the sun, spray the windex on the glass, place the plastic over the glass and let it sit for an hour to cook... Than simply pull the tint off the glass. Th hotter the day, the less time you will need to wait... The windex dissolves the adhesive in the tint when it is heated., thus allowing the tint to come off easily.