so seeing as i have done a lot of work repairing corrosion, installing newer and safer aircraft grade components, including paint and corrosion resistant treatments, now do i have to remove all the new parts, install the old worn, corroded and cracked parts, apply for engineering approval, wait, pay, and probably pay again, before i can reinstall the new parts again? and who do i trust to approve all this considering i have been an aircraft structures engineer now for 25 years, with experience on every airliner boeing and airbus make, and the entire aus defence force fleets, i now have to trust someone who doesnt know the inside of a Savannah from a drifter?