I find little use for Proofgrade myself. I would like if I could but what I want to do has little that is available. The Plywood is made with MDF in the middle that cuts evenly but has a lot of structural issues and will dissolve with many solvents. I would guess Canada would have good supplies of many useful woods. and other materials,
A bit of experimenting and you can have useful settings for any materials you find, I use this and keep the collections for reference…