Have you tried printing these on US Letter? (I have to see if any of the local print shops in Canada handle A4 still. Last one I checked didn’t.)
For the DriveThru version do you happen to know what paper weight/finish they use?
I haven't tried it, but it shouldn't be a problem to print on US letter size, the pages has plenty of margin around the edges.The DTRPG version is printed on durable premium card stock with low-gloss UV coating. I think it is nice and good quality.
