So found some GIMP limits. =)

Apparently, a brush can only have 100 frames. I think I would need 360 to have a chance of making it work as is. No harm, no foul, I learned a good bit from dinking around with the various options. And I think I might go back and refine this one for making random plank bridges. Thanks Rob, Redrose and Tiana for the pointers!

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