While this drawing is definitely more complicated than the base plate and adjusting arm it comes together really nicely at the end. You will need a compass and circle stencil to help you draw the circles, arcs, and fillets and you will need both triangles (30/60/90, 45/45/90) to stack to be able to produce the angles.
Drafting Board
Drafting Paper
Drafting Pencils
Eraser
T-square
Compass or Circle Stencil
30/60/90 Triangle
45/45/90 Triangle
Architectural Scale
Draw center lines for the base of the drawing
Draw angled center lines and center line for the main arcs
Draw circles and arcs
Draw connection straight lines and arcs
Draw fillets with tangent arcs