Thank you guys for all of the help. I'm happy to report all is well and working. Here is what I found. On the large black gear for the recoil there is a large brass nut right in the center. When I activated the cannon, the carriage that the barrel attaches to starts to go backwards right, as the carriage moved backwards, it was getting hung up on that large nut. I tried to raise the gear so it was level with the top of the nut but couldn't. So I ground down the top of the nut so if was flat/even with the top of the gear. Prior to this I removed the recoil motor and found it was working when I hooked a battery and alligator clips to it. Also, having the motor out allowed me to manually slide the carriage and barrel reward. Thats how I saw it was getting hung up on the nut.