[@mmc_jake]

I wasn’t familiar with latch hooking so had to look it up to get an idea of what is involved. (This video was a good start:https://www.youtube.com/watch?v=zveh_dWZsSE)

It may be possible to create a 3D printed grid/canvas in addition to the tool. It looks like they are typically more flexible, but at least as a first step a 3D printed grid could provide an easily customizable hole size. There are flexible filaments available, though they tend to be less common.