This place is great! They offer safety classes before you sign up for a membership, and the workspace is big and well maintained. I needed some basic lessons with table and band saws, which went great. I didn't ultimately get a membership because my sawing needs are very specific, and ended up getting a small bandsaw for myself at home. But if you're someone who needs the whole range of tools, this is the place to be!
A better solution would have been to route a rabbet into the side, so that the added strip always had thickness. The way I did it means that the strip I glued in is very narrow, and hence very weak, at a certain point. In this case, that's not a problem, because it's going to be sitting under the countertop layer. I also noticed that because I had only clamped the strip down, and not into the edge, there was a noticeable glue gap where the strip butted up against the MDF. Again, in this application it isn't visible. But if I was doing something like this on the top of a table, I'd make sure to cut a clean rabbet, and to clamp both down and in.
Timberframing is a traditional technique for building large and small structures using only wooden joinery. Prized for its structural integrity and beauty, as well as reliance on hand skills, timberframing is regaining popularity in modern applications. We will start with an overview of the different styles and aesthetics involved, and move into the specific tools that are used to lay out and cut the strong joints. Each student gets guided practice time making sample joints. We will all work together to make a small structure that can be raised on the final day of class.
I agree that even at 12x12, things'll be "cozy" inside. That's OK. Keep in mind that this will be a general purpose hobby shed, not just a wood working shed. Even 12x8 would be plenty big enough for building 1 meter wingspan bungee launched RC gliders. And for the electronics projects I do, I only need enough workbench space to do some soldering with a 3rd hand (for electric guitar pedals). If I need more room than the shed offers for wood working projects, I'll just roll the table saw down a ramp and do my cutting outside in the sun.
The shelf in the first picture is made of red oak plywood. You can choose the wood type, color and design as you like for your project. In case if you need more help understanding this project, you can refer the source link below. It discusses various items used, steps and tips and personal experience of the author who personally built a Zigzag shelf.