Bob, looking at your pictures I think you will have to remove the trigger plate. You are part way there; first get a screwdriver that fits the screw in front of the trigger guard and the one under the top lever.
Procedure:
1. remove trigger guard
2. remover rear tang screw
3. remove floor plate screw in front of the trigger guard
4. loosen screw under top lever and tap it down to loosen trigger plate
5. remove trigger plate
6. carefully remove action, it is not necessary to remove sears on the Sauers I have seen. Be careful, yours might be different, don't force any thing, you don't want to damage the stock.
Jim
