Can I prevent the back of a single layer veg tan belt from buckling like this?

[kgg]

15 hours ago, Freak_NL said:

I guess I'll bite the bullet and order me some side

With NL in your forum name I am going to assume you are from the Rock, the old country.

kgg

[Freak_NL]

5 minutes ago, kgg said:

With NL in your forum name I am going to assume you are from the Rock, the old country.

Nope. No rock (or mountains for that matter). Just clay below sea level.

[Freak_NL]

Two months ago I made another belt incorporating the advice given here. These photos are after two months of wear. Here I used strips of 6 oz leather cut from a half hide, starting from the back. The belt has a strip of 0.6 mm reinforcement sheet sandwiched in the middle with a margin of about 5mm from the edges. I hand stitched the belt (in addition to glueing).

Overall I am not dissatisfied with the end result. It is, at the very least, a functional belt. There is none of the bunching up from my first post, only some deforming of the tongue where the buckle sits. Eventually I intend to make a simple belt single layer belt out of a piece of 8/9 oz side to see how that works out.

The thickness seems to be the cause of me misjudging the belt's length a little. As you can see my standard wear hole is the second one instead of the (ideal) third out of five. For this buckle this 12 oz thickness is a bit too much I feel, so my next attempt will use two 4 oz strips.

[AlZilla]

That buckle has quite a bend where it comes out of the belt. That may be causing some of it.