Pierce only and pierce delay

I'm about to cut some parts on some 1"(24mm), so I've been trying out pierce only for the first time.
I am running linuxcnc 2.9, so i think I might be missing some things in the parameters that are in 2.10?
A pierce delay of 1.6 seconds works fine in pierce only mode, but when I switch back to normal, I still have a 1.6 second pierce delay, which is obviously too long.
Is there a way to change the delay without editing/saving the g code file each time? I am using sheetcam to generate the gcode and i assume plasmac is set up for me to use the material files in plasmac, but even if i set up materials in plasmac, wouldn't I still need to edit/save the gcode or material file each pierce only operation?

Is there a way to access the pierce only offset if it's not in the parameters tab?

I have to ask, why are you editing/saving gcode?
Does sheetcam output the plasmac-feed-rate ?
See if you can edit the post processor to add this: as a header/preamble.

Open the post processor in a text editor. There are some settings you can change which allows QTplasmac to be the master of cut settings.
There is a script included that converts a Sheetcam tool file to QTplasmac format.