I tried a few toolboxes, settle on an open tote bag for a while but still found everything ended up in a jumbled mess at the bottom, and brake fluid/shock oil soaked the bottom which isn’t good as it spends half its time indoors.
Then I saw a bucket organiser bag in a horse shop, got the gf to buy it and then emptied my toolbox into it before she filled it with brushes, hoof picks and horse treats…it is perfect, decent tall pockets for all the tools, and all the bottles of fluid stand in the bucket and can’t fall over and leak. You would still need a compartmentalised box for all the bobbins, though I just keep them mixed up in a couple of ziplock bags and then stuff them in the mesh pocket on the outside.
http://cgi.ebay.co.uk/BRAND-NEW-BELSTANE-BUCKET-ORGANISER-GROOMING-ITEMS-/190487833922?pt=UK_Horse_Wear_Equipment&hash=item2c59f5ad42#ht_500wt_1156