Removed scraper bar and support. Removed flight paddles. Several retaining screws were seized requiring WD-40 and vice grips for removal. Torx sockets stripped out due to threads being seized. Hex head cap screws would be better for both scraper bar and flight papples.once the screws were removed I used a tap to clean the threads and applied lubricant to minimize future corrosion. Three of the four lock nuts for the scraper bar were either not included or lost in shipping due to poor packing requiring me to purchase replacements. Overall, the job took longer than it should have due to the additional time required to remove seized screws and acquire replacement lock nuts.