First of all, thanks for contributing these to the community! I would like to chime in regarding the upload quality.
JPG images uploaded to the Pinside forum are always re-compressed to save our storage and bandwidth. For forum usage this is fine, for sharing custom score cards : not so good.
In your case, I would suggest uploading these in a PDF container. This will also allow people to simply print the PDF with Adobe Reader and always have the exact size printed out.
Another solution could be to zip the JPG, avoiding image re-compression. But we currently don't allow .zip file uploads. We may in the future to support efforts like these cool score cards.
Hope that clarifies things a bit!