I am at my breaking point on how to take this shower handle off. Its a delta and I need to replace some o-rings in it to stop my leaking faucet. I dont seem to see a set screw anywhere on this thing at all. I took off the backing plate to still find nothing. How do i take this thing off so i can access the inside?? Thanks in advanced for any help at all! Its a Delta, Monitor, and it says 13/14 Multichoice on it!