Keep the prints on the roll and cut externally? I did not have any problems with fine art papers up to 310 grams on 3"cores but have no experience with heavier papers. My main problem has been with cheaper 150 grams paper on 2" cores. The last 10 meter I decurl over night on another roll and roll back the next morning. Will not be that easy with 350 grams.
met vriendelijke groeten, Ernst