Kreiga US-5

As the Title, does anyone have/use a Kreiga us 5 tail pack?

If so how much stuff can it fit in?

Im after a small-ish tail pack to carry my 1.2 metre chain and padlock and possibly my disc lock and was wondering if they will fit in wel in the us-5 or will it be too small?

Ive got a US 10 already but thats too big resulting in the chain and other bits rattling all over the place every time i go round a corner.

Would be good to hear from any US-5 owners.