Process

The first part of the process was to remove the material  at the center on each end of the tube so that the power cord could pass through it. There was roughly a quarter inch wall on each side of the tube left from the machining process that created it. I began by drilling small holes around the perimeter of the tube inner diameter. I started with a small drill bit, and gradually increased the size until most of the material in the center of the tube was removed. I then planned to try and grind the rest down until the material was removed. There were problems with this as the grinding bits on the die grinder would pickup the material and it would get caught in the abrasive bit. This ruined the bit and made for a terrible process.  Luckily, I found a hole saw with an OD that matched the ID of my tube. Using the hole saw, I was able to removed the remainder of the material in the tube. The progression of this can be seen in the collage below.