I know these are used for pictures and so there's a lip that somewhat hides the feet of Minis when displayed. I wasn't too crazy about that look so I decided to flip them and add holes on top of the pre-made ones to add support.
Here's the first one up
 
 I then had an idea to have a tier ledge so I went to Home Depot and bought some wood that I just needed to cut a few inches off and taint to match the color. You paint or taint these up to you

So here they are all set up and with the tier ledge on top
And Finally, all the minis on there and I went with the staggered display. There's enough room to have it even higher if you wanted so you could see the full figure in the back or even add 3 tiers.
Also, a very cool idea that I thought about would be that you could add a light strip or some other kind of lighting that would hide behind that "lip" that's now facing downwards. Cool detail you could add to your display.
Just wanted to share what I did.



 
   





