TexasCHLforum.com

I made an inset for My Versipack that holds my holster and a spare mag in such a manner that it keeps the back compartment open.
It has velcro attached to the back to keep it in sync , but really isn't needed.
Kydex allows you to form a back with a bottom lip and then rivet in a holster and mag holder. If I had really worked at it, I could have also made a holser for my flashlight.

It extends the usefulness and ensures that the gun is at the same place all the time. Speed in drawing has increased dramatically since I no longer have to feel for where the gun is.

There is a commercial manufacturer of such a thing which I found after making mine. It is advertised as an insert for the Brigade kit. I think you can find it on CTD.