From all this....

The component parts of one of my notebooks: Japanese Chiyogama paper (background), then clockwise from top left - 2mm binding boards for front, back and spine; artists' cartridge paper for each endpaper; kraft paper for spine lining; mull to reinforce spine; head and tail band; ribbon marker; folded sections plus printed title page (which can be personalised); linen sewing tapes; linen sewing thread and book cloth for quarter binding.

I could use less material and dispense with the tapes and possibly the kraft spine lining but I don't like to scrimp and I'd hate it if one fell apart.