Removing Roof Frame Reinforcement

Cutting the spotwelds
1. 1.1. Mill off spotwelds in area -A- using a spotweld cutter.
  
  Fig 1: Cutting Spotwelds
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Separating and milling off welded joints
1. 2.1. Separate inert-gas welded seams in areas -A- and -B- from the inside using a parting grinder.
2. 2.2. Mill off spotwelds in area -C- using a spotweld cutter.
  
  Fig 2: Separating Welded Joints
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.