Pretty simple holder for the original push blocks that come with the Porter Cable Jointer.  The holder attaches on the back of the fence, and top to bottom is just shy of what the fence measures.  It definitely could be shorter, but I wanted it to look uniform with the height of the fence. 

Along with this I have the file for the T-nut that.  I used a M4 nut.

The hardware used, is from Inland and is a M4*12mm round cross head, and a M4 nut.