Either way certainly works. Michael Smith has a page on his website that compares the stability of dry mounted vs not dry mounted. He claims that dry mounting is better. Not sure if he is right, but let's call it even The argument about a damaged mount is certainly true and museum preferences, but to me it is an aesthetic choice and I prefer to dry mount regular gelatin prints. For my few alternative process prints, I've used corners since they are very flat to begin with.