1. When installing new parts, position each part so that the section measurement align to the body dimension.
2. Before installing new parts, drill holes for plug welds in advance. In areas where the outer, reinforcement, inner, etc. are in 3-4 layers, drill holes for plug welds in all but the innermost panel.
3. Install the inner side first, then the outer side.
4. Welding of the reinforcement and inner panel should be performed during welding of the outer panel.
5. After trial-fitting new parts, make sure the related parts fit properly.
6. When joining the new and old parts, temporarily install and fit the new part in position, measure each dimension according to the body dimension drawing, then adjust the position to align it to the standard dimension.
