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That said, Ian I looked on your site for JB-x and wasnt able to find anything. I'd love to see what youre selling.
PCB manufacting has gotten cheap enough that I seldom bother to use fingerboards anymore... It's easier to just fab dedicated adapters.
https://iankellogg.com/catalogsearch/result/?q=Jamma
It's pretty frustrating the site won't return results for jb3 or jb-3. Both if which are in the meta tags.
Thankfully, this isn't my profession, kiddo....
And those pictures are from 15 years ago...
I use the same cart engine as twisty. It seems to be okay with most 3 letter or 4 letter items and meta tags but it has issues with 2 letter and some 3 letters.
So the pictures on your site do not represent what you sell? Very professional. You're either a liar or just a poor businessman (or both).

So the pictures on your site do not represent what you sell? Very professional. You're either a liar or just a poor businessman (or both).
Since you'are apparently illiterate:
1. This is not my profession
2. This is not a business.
Nobody's ever complained about buying boards and not getting perforated edges.
Not sure how exactly this would be used with another harness type but it would come down to demand as to whether they get made. Its not very expensive to do a run of 25 boards this size but I would have to see demand to modify the design.