Ah, I see. I was confused because of Aion Codex site . When you typed glyph box, it gave you the box that contains no Glyph enchantment scrolls.
https://aioncodex.com/us/item/188075046/ (regular glyph box with no scrolls)
But after typing the heavy glyph box, I do see
https://aioncodex.com/us/item/188075132/ that they have enchantment scrolls. And I re-read weekly lugbug, it does say the 100 glyph box fragments combine into a heavy glpyh box.
Thanks for clearing the confusion.
Although, is it really selectable? The free ones from BCM were heavy glpyh boxes but not se