This is similar to other plugins out there (since there are about 8 million of them on this site)
Curtis' Dots, for one... but that one doesn't use path gradients.
Anyway it's my first plugin using GDI+ (thanks to Red ochre for pointing me in that direction)
and done entirely in CodeLab, my favorite 'plugin'.
...and not much to do with dot-matrix printers, if anyone remembers them...
(Found under Stylize)