Small grain of sand, I've already told you that in my searching I found complaints about Cambo/Calumet roll holders. I didn't say, should have, that all sizes seem to be problematic. Problems reported include fragility, scratching film, and tearing film.
Its time for you to do some searching yourself.
Sorry, your description said "problems" followed by complaints about weight... you didn't say anything about scratching etc, and since I don't care about weight, it didn't flag in my brain...
~Stone | "...of course, that's just my opinion. I could be wrong."~Dennis Miller