1/2 moon key

I posted before about replacing the axle seals and bushings on my horse tiller. things were going along pretty good until i lost the keys down in the transmission. I guess I did not have the keyways lined up and pushed the key out. Not once but twice!! I have been trying to fish the keys out of the bottom of the case with absolutely no luck. I have used a coat hanger and magnet. I broke the head of the magnet off and now I have to deal with that.

It looks like I am going to have to remove the gears to get in the bottom of the case to recover all of the junk I have in there.

I have a link to the part of the manual that tells how to remove the transmission. Does someone have the link to removing and replacing the gears in the transmission? I would like to have a link to the complete training manual if anyone has it would like to share.

Thanks in advance for any help, Pete