my project 90 my rear offside chassis and rear cross member are shot along with door pillars both near side and off side and centre out riggers the pole type front of rear tub- back of diesel tank i have bought new door pillars new rear cross member with extensions and have 50mm pole to do the out riggers with a little fabrication not too worried about them but the rear cross member is a little daunting and door pillars have me very worried i have 4.5 inch grinder at the ready with a assortment of discs and a gasless mig and a arc welder which i can use to a limited capacity (every job i try is more experience along with the mistakes) my question is what should i be worried about and what problems am i to encounter as never really tried body repair before now