Aleko,
My comments on the prototypes.
I used a 15 round belt from Murray Leather in Zim 2004 for both my 450 No2, and my 9,3x74R. I also have Murray buttstock shell carriers on both rifles. I like to carry a lot of ammo as most every day we were several hours walk from the truck. The Murray belt has good spacing between the rounds, but the 15 round capacity goes about halfway around my body.
SO, on your 6 round carrier I would prefer the rounds to have equal spacing between the rounds as I think I am to "fumblefingured" to pull out 2 at the same time.
A good idea would be to have the 6 round carrier, and the 10 round "floppy" on you belt at the same time, which would take up less belt space than my 15 round belt.
I always load first off of the buttstock shell carrier, and replentish the buttstock carrier from my belt ammo at the first opportunity.

I have seen several Africase products when I have been to Aleko's store and they are well made, with nice leather.
The codura rifle cases are nice too.