This was a great learning experience and I look forward to building another and learning more.
As a troubleshooter you are probably already aware that you cant judge by appearance but by performance.My disposition is that I look for faults first. As a troubleshooter, this is the way. I don't like what I see regarding the brands you chose for the electrolytics. These look to me as Chinese tier 3 quality.
I had a drawing sent to me by a builder.Did you work from a schematic or a build sheet?