Super-Pixels : size of black line separator

Is there the possibility to have a user’s adjustable size (now size is fixed, only opacity is adjustable) for the tile separator lines in the SUPER-PIXELS filter?
This would allow to get the same “look” irrespective of the source image size.
(I know I can do it myself in the filter, just fixing the layer size before running the filter, but this will also change a bit the “colors and details” structure of the original source image)

Added new option Border Thickness :

Wow, very quick!
Thanks a lot!

A compare between:
-the current release 3.3 with the new options (thanks again David!)
-the previous release of G’MIC
You can see how the color in the light rays and the thickness in super pixels can influence the outcome