At Mattiazzi old methods exist side by side with CAD. Here a number of traditional construction jigs hang on the workshop wall. Published October 9, 2012 at 800 × 600 in Grcic and Mattiazzi make a chair At Mattiazzi old methods exist side by side with CAD. Here a number of traditional construction jigs hang on the workshop wall. At Mattiazzi old methods exist side by side with CAD. Here a number of traditional construction jigs hang on the workshop wall.