First, you must set your neck. Use a string running down its center line and down the bodies centerline to line it up and fasten it down.
Next check your plans/templates. The front edge of the bridge/pickup baseplate lines up with the front edge of a standard MIM bridge plate. I don't know if that's the same size as other model plates, maybe some one else here can chime in.
You now have the front cross body alignment. Next center the plate side to side on your centerline. Tape it down and mount with a couple of the small screws.
Mark the rest of your hole locations. CAREFULLY mark and drill the bridge insert holes.
There now, Bob's your uncle. Now mount the Bigsby itself as shown in the video.
