Using the last tile finder it is leading me to a rock by the helipad--what gives?
w1lkit Under that rock is an exit. The exit will however only open from the other side, which is the end of the mine. So move to the end of the mine and keep trying the LTF until it stops sending you back to the start of the mine.
A map here: https://drive.google.com/drive/folders/1G00QxvmX6q2jXtZy1GvEhkM7sPPSIKLU