Here's is a progress update on this briefcase.
I've done many custom briefcases throughout the years as most serious members of this forum know. I have done many interesting additions like putting metal handles on cases, i even had a customer that wanted to incorporate a rare wakizashi blade into the handle structure. Clients have come to me with many different types of locking mechanisms but this is a first where the lock was custom made. I appreciate the passion and need to have something unique and why i still love to work on these types of projects instead of sitting on 5 styles and mass producing them.
On the original hasp - it fit the leather but once i added the lining that loop would not catch. I just got these new hasp types made for my Hampton combination locks as seen below, They completely cover the flap making it very secure and it puts the loop underneath making the close much easier.
i had to shave that loop down a bit to fit your lock but it is not really noticeable and its from the inside. If you do change the hasp just make sure there is another plate underneath
i think the 2 parts match fine (sorry about the bad photos i just don't have time to set them up but I'll include great final shots)
here is the inside of the main plate lined in black veg tan calf leather with the umbrella straps under the flap. I know we initially said to put them into the permanent screw posts but i felt under the bar was much better, they are removable although tight and on the posts would have been a pull on the leather that would stretch.
the inside compartments have the a lighter saddle tan
you can see the top main plate with the corner back pack rings. i know you said you only wanted the shoulder strap and i guess you were going to do something with the back pack rings at another time, but i am also building and will include back pack straps at no charge.
here is the front plate with the lock and the bottom straps
my only caution is that you said you may want to take the bottom lock off for whatever reason, you will find it very difficult to put it back on so only do it if its absolutely necessary. It is going to be hard to get a screw driver into the formed 2" compartment and also the leather barrier is fiber and i make the holes just big enough for the screws to actually need to be screwed into the leather that way it is very tight and the lock will not move when the bag softens up. This is not wood or metal where the holes stay at the size they are cut. As you can see I'm installing the lock on a flat surface when the bag is formed its a different ball game.
the reason why it will be difficult is because - most screw in locks don't install like this. The old ones are riveted from the outside. Many of the modern ones have prongs. The ones you do screw in have protruding posts that go into the leather holes making them very easy to screw. With your lock, the post is the screw.
BTW, if you can visualize it, trying to set this lock in the right position on the leather was very difficult. If it had those posts, like most locks, i'd be able to set the lock, press the posts into the leather to mark where i need to punch the holes. This way took very precise measurements and luck.
more to come......