I haven't used the Base Plate but I have used the Viking Arms. They are wonderful. We are working on a kitchen remodel and my husband is hanging wall cabinets. I don't have the stamina to hold them level for the install. He set up the Viking Arms on a scaffold and 3/4" plywood base and used the Viking Arms to hold and level the cabinet. He was then able to screw the cabinet to the wall. We will be using them for the rest of the kitchen walls and may need them for the cabinet bases when we need to level and shim if needed. They are extremely well built and I am happy I didn't fall for the cheap knockoffs.
Love the arm! It is incredibly handy and built like a tank.
It works as intended. Very good quality.
The items are of great quality. The functionality of the tools are perfect. One of the best quality tools I've seen in a long time.