You are really close. put the extractor back in as it may or may not interfere. Use some 4 or 600 grit paper with a metal backer to lightly polish the high spots on the breach end and the end of the locking extension. How much contact do you have on the hook? you should get the top lever back in to see how it mates to the locking extension. get all that done and the fore end iron will probably need fitting. Good work and good luck.