hello all im trying to restore a triumph herald chassis i want everyones opinion here!! the chassis its self is 2mm thick it is what i think most would call c section it is closed with another section of steel wich i beleive is also 2mm now the area in question is the centre part of the main rail and the back end also the front part... my plan is to cut out the roten sections peace by peace and replace them with the same thicknes 2mm i am planning on doing a but weld but first shamper the edges i think thats what its called is this a safe way of welding a chassis?? i cannot find a chassis any better it was made in 1965 and latest 70s so no chance of finding one any better i will read everones opions they are greatly appreshiated