I was home alone today so I built the LED display partially, mounting the modules on aluminum rails and also worked on the software to run in the NCID display. This thing is shaping up. Left for dance at 3:15 and met Libbie there. We continued to practice our waltz routine. Dinner was spaghetti with Marinara sauce and cheese. Very good. Afterwards i did some more study of preferred issues and also looked at bonds. I was woke up at 4 AM the next morning by a loud screeching downstairs. I got dressed and took the flashlight outside and looked under the house but didn't see anything. I looked on the porch and also turned power off downstairs but nothing. Eventually i found that the laptop had gone into a feedback cycle while doing an update, the speakers were howling very loudly.