You can not use these options together on the same device per the following reasons:
QEL/EL device retracts the latch bolt of the exit device allowing entry.
CX (Chexit) device ...
The hole should be drilled in the field once the end cap is located on the door. It is a 5/8" hole, that is located 5/16" from the end of the mechanism case. See installation instruction of t...