On the subject of electric layout. I did similar to above notes ie 120V ckts every so many feet, 220v every so many feet, and dedicated ones for specific tools. I used the OSB approach on the walls as I mentioned earlier. All the wiring was in the walls before the OSB was put up. However, all the boxes were surface mounted. This gave me the advantage of easily adding a ckt if needed ( in ten years needed to add three ) and not having conduit all over the shop walls. The other thing I did was each of the 120v boxes were four hole, there are two independent ckts in each box.
Bob
Bob