Lisa Expansion Slots are unique and require unusually shaped boards.
This thread is for documenting what works and doesn't.
I've made a few expansion boards over the years, and some have worked out better than others.
Attached are my current design notes for the physical dimensions of Lisa Expansion Boards. (Dimensions are specified by coordinates as that's how PCB layout software works.)
I certainly do not believe these are definitive, so are apt to change and dimension suggestions from others may be preferable.
References to expansion "board" and expansion "card" are interchangeable (I think, I haven't figured out why/when I switch between them :) )
Edit: zipped the high resolution png as it was way too big for in-thread display.
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In this thread https://lisalist2.com/index.php/topic,109.msg752.html#msg752 (https://lisalist2.com/index.php/topic,109.msg752.html#msg752), there is a template for the Lisa expansion card in Eagle CAD format.
Brilliant, thanks all!
You can also use my reverse-engineered 2-port parallel card (https://oshwlab.com/AlexTheCat123/apple-lisa-2-port-parallel-card) as a template. I design my PCBs in EasyEDA, but it can probably be converted into other formats for other pieces of design software.