As you know we are experts in delays (PSP 42, PSP 84, PSP 85, PSP 608 MultiDelay and released today PSP Echo).
Reality is that I missed your posts since I have assigned wrong email to the Nitro topic. Sorry for that.
To bypass operator simply press command (or ctrl) key and click on OPT1/2/3/4 button on the plug-in GUI.

Warm regards
Antoni Ozynski