I just got a 6075 Lowride UBL with QLS22 for my 6354DO and since there is obviously some interest regarding this combination, here are some photos to show my current setup which, after trying multiple solutions, I find to work best for me. It gives me the option of running with or without a utility belt without the need for moving the holster around, at same time as enabling a smoother draw compared to my previous setup with the holster attached to the utility belt itself.
First, here is the holster without a utility belt. The UBL is very rigid and stays in place. If you plan on running this setup only, the 6070 midride version is also a viable option which gives you a bit higher holster placement.
Here shown with a Crye Low profile belt. I wear mine without the additional pads so as to make it more low profile and it sits very well atop the UBL. If you plan on wearing a utility belt over the UBL do not go for the 6070 midride option as the higher placed holster will likely interfere.
As you can see here, the belt will not interfere with the draw (as long as you don't use the pads for this particular belt).
All in all a solution I can definitely recommend.