Big LED sign with 6x4 of 32x32 P6 LED panels

My latest LED sign is by far my biggest LED sign yet!  I purchased a pile of P6 32x32 LED panels on eBay for about $10 each.  The seller even included the cables needed to get it to work!

Here is a picture of it with a TF-QS3N Controller.  It uses PowerLED to set it up from a computer over a newwork.

This is the back side of the sign as I was assembling it.  The sign is now over twice the size shown in this picture.

Here is a newer picture at 4 by 7 panels.  It is now 5 by 7 panels in size and growing!  I hope to get to 5 by 8 panels but the model numbers of the next panels do not match and the color balance might be too far off to intermix them.

One option to connect the panels together is these metal brackets available at most hardware stores at four for $5.00.  Thes have a hole spacing of one inch (24.5mm) and the panel mounting holes are 24 mm so there is a 1.5 mm gap between the panels if you uses these brackets. 

I have 3D printed my own brackets for connecting the panels.  They were designed on TinkerCad.  The STL files are available on thingiverse. 

Here is a video of when I first got them working.