LM2596 buck converter - barrel jack input

I have a bunch of 12V AC/DC adapters laying around, so I've been combining them with LM2596 buck converters. I've made the first piece in a hurry for a friend's project, so I have no clear pictures of the product yet. The space is quite small inside the case, so I recommend bending solid core wires between the jack's legs and the pads on the buck converter. 

Parts:

• 3D printed case: top, bottom, jack plate
• L712A (DC005) female jack, straight legs
• LM2596 buck converter board
• 2pcs M3x20 countersunk screw (shorter can also be used if you are not using a nut)
• 2pcs M3 nut
• 1-2pcs of M3 screw, 3-6mm thread length (for securing the board)
• 1 ziptie for the output wire(s)

Features:

• The jack is mounted on a separate plate for easier printing and ability to remove it from the casing during and/or after soldering.
  • If the printed plate is too loose, i recommend to print a second one a few percents larger for a snug fit
• Same ziptie mounting on the output side as the original
• Modified trimmer pot coutout, higher chance to fit random boards
• I haven't modified the securing holes and doesn't fit my exact board, however for me 1 screw holds the board perfectly
• The case's holes are chamfered for countersunk screws
• Slight chamfer on the top for the looks