Input power question

[jswingchun]

I have my blender pedal all put together. I built it without a battery, just the DC power input.

When I connect power to the input jack when the jack is NOT mounted in the enclosure, the pedal works fine. When I mount the input jack in the enclosure it shorts out the pedal.

I am using the metal jack from Smallbear. I just found this:

Jack DC Power, 2.1 mm Metal
SKU: 0612
The metal bushing is independent of the power contacts. Some applications will require insulating the bushing from the chassis, so that the shell of the plug won't short to ground.

This is probably simple to you guys, but I don't know what to do. What's the easiest solution?

Should I just find a plastic DC power jack?

[petemoore]

  Test for continuity between +'s and -'s in the supply with DMM, under all various conditions including does mounting the jack short the +/- pins.

[12milluz]

You could file the hole down a bit and then put electrical tape along the edge, that would keep the metal from touching the enclosure. Has worked for a lot of people