Snuck into the garage last night and got a little bit more work done on the acrylic post for the back corner...
The tube is 1 1/4" diameter, and I just so happened to have a hole saw in that size. So I marked the top of the panel and cut it out.
For the bottom hole, since it is on an extreme angle, I cut the tube to match using my miter box.
This will not be the actual tube end, I'm just using it to trace the bottom hole. I'll square it off again so it sits flat at the bottom of the case.
Here's the tube in position..
Now that I have the hole traced, I can cut it out and the tube will slip right down through it without any gaps.
That's all I had time for last night, more on the tube's purpose next time.