I too miss Walter. I had many conversations with him and found him to be an incredibly bright, passionate and most of all helpful maker. He was generous with his time and his resources. Many of us have benefited from his teaching. He taught me to make a Michigan Mighty Mite. Build a radio transmitter class
Although controversial at times Walter was always engaging and most of the time very enlightening. I believe he could argue either side of an argument just to get people talking.
I like so many miss him around the space and, of course, on talk. RIP Walter.