A5scott,
DO NOT DO THAT! What are you doing man haha? You are making this 10x harder than it is. Read the comments from Plange. Post #5 spells it out clearly, as well as #8 from j-dubya.
The only screws you touch are the ones actually holding the turret cap on. All you have to do is loosen those so you can slip the turret (which means to turn the turret without it making adjustments) up 2.5, re-tighten those screws, then dial down to zero. The zero-stop resets itself.
Since you already have the cap all the way off like a maniac lol, put it back on at "0" but don't tighten the screws. Rotate it like you were dialing up 2.5 (or whatever you need to come down) so that it reads "2.5". Tighten the screws to secure it, then dial down to zero. This will pull 2.5 mils off the turret (getting to your zero) and the zero-stop will automatically be reset so you can only go .2 below zero. Ok man, hopefully that is easy enough for you and you can get zeroed and go shooting! That is a great scope. Good luck!
-TSean
P.S. You should look into getting a mount with 20 moa (or 30) to be able to use the full 12 mils of elevation available on the turret...otherwise you are only going to have around 6 "up" left I would think.
P.P.S. Attached (I hope) is the manual for that Premier LT, should you not have one.