When I received my order from 3u Shop there was a extra module in the package. This multiple was one of the first modules I build with my reflow oven. It was small enough to test the oven and with me having to spend a lot of money on parts. Any multiple in your rack can be nice but this one is buffered. Meaning it can also be used for multipling pitch CV’s. I work straight out of the oven so pretty happy with the results. Thanks 3uShop for adding it to my order.
Difficulty to build: Hard /Medium
SMD, but this could be a good start for experimenting on SMD