Designjet Driver - Borderless option disappeared

[ChrisCog]

I have a Z3100 that I have enjoyed printing borderless 24x36 posters for some time. However, on the upgrade to macOS Mojave and/or driver version 32.0, the print dialog has changed (for one, the graphical images of the result have gone) and a "borderless" option is no longer visible. I See "overprint", but with various incantations it's still printing with a 1/4" border.

Here's what I've tried:

- Seleted a paper size with no margins.

- In "Paper Handling", tried with both of "Scale to fit paper size" on and off. (and when On, selected the 24x36 I had created)

- In the HP-specific "Printer Features"...

-- General; Paper Source: Roll

-- Finishing: Remove blank and disable cutter both off

-- Layout: Tried both "Oversize" and "Automatically by Printer".

Any help is greatly appreciated. Thank you for your consideration!

[ChrisCog]

Oh... I got it working... looks like there was one combination I didn't try: "scale to fit paper" + "automatically by printer".

Which is an odd combination. One would think "overprint" would be the right option, yes?