 Complete the following phrase:  Chris Amon stayed with Matra, using the Matra MS120C specification version for 1972 before being replaced by the Matra MS120D version mid-season. The Argentine Grand Prix was a bad race for Amon with gearbox problems on the warm-up lap. He then finished 15th in the South African Grand Prix. More gearbox problems followed at the Spanish Grand Prix, before luck came Amons way with two sixth-place finishes at Monaco and in Belgium. The French Grand Prix saw Amon on pole and he was leading the race until a puncture forced him to pit, but he charged back through the field, bettering the Charade Circuit lap record to finish third. Amon finished fourth in the 