Simple error hours of work....

I’m building a screen based catalyst for the blue ball. Unfortunately I can’t talk much about the catalyst construction, I have a NDA with a third party that covers parts of the design I have parts that are from public sources and parts are my own creation alas its hard to tell what part  I’m free to discuss here so I won’t really give any details. One of the steps in the process involves cutting about 100 disks from some screen material. I want these to be fairly tight in the bore of the cat holder, so I measured precisely , twice and got the disks all cut at thunderbird  water-jet. After all the subsequent processing the disks were all about 0.05” too big. They bowed big time when forced into the bore.  So I spent my evening building a fixture for the CNC mill that precisely places the slightly too big disk, clamps it around the edges and then mills off 0.05” from the diameter. In the final process I did the disks 6 at a time with a clamp, rotate 90 degrees and re-clamp step in the middle. It took me about 2.5 hours AFTER I built the fixture.  Arghhhhh. In any case I’m going to go to bed before 11:30!!! What a treat. Remember boys and girls sleep is a no credit elective!