I'll answer your question,,he will need to fend for him self,,
I considered stitching the belt loop closed,,,then the Diesel Mechanic in me kicked in,,
and i started to considder how in what condition it would be in after,,,,mmm ten years of use.
If the stitching goes bad on the belt loop,,then how would i repair it??
i would need to unstitch the entire sheath and try to tear the "Barge" boot glue to open the pocket before i could start a repair.
But if the rivit brakes,,i fish a new one down in its place,,slide a bar into the pocket as an anvil and pean it over.
second question: i use 7-8 ounce leather to form the sheath.
also,,after all is done,,in the very tip of the sheath,,i run a nail into the fold to clear out any glue plug so water or sand/ dirt,,ect. will have a "clean out" hole.
Skip
PS: the shim doesn't go down to the rivit,,in the space behind the belt loop,,you could stash a coupple of bills for an emergency.