Blue Grouse-
1. The two small screws do not retain the ejectors. They hold a hardened piece of steel in place where the ejectors bear on the forend iron.
2. To remove, put the forend on the gun and trip the locks using snap caps. Then open the gun so that the ejectors trip and remove the forend without first closing the gun. They are now in the "fired" position and have less tension. Remove the iron from the wood and notice a small cross pin in the iron. Drive this pin out left to right. Now the only thing holding the ejectors in is spring tension. With the forend on a padded surface, push down on the two lugs that protrude up through the iron. They will pop out with a little force.
3. If you cannot disassemble the ejectors, you probably should do no work on them other than removing them to make the gun an extractor.
