Thanks, I've read that thread and it was very helpful up to the point of withdrawing the entire assembly. My problem is I cannot get the assembly to withdraw so i can remove the lock pin that is accessed from the back of the unit. Ive got it to the point where the pin is no longer a critical part but the entire unit is stuck somwhere in the steel barrel. I certainly dont want to take a bfh to it so i was hoping someone has come across this and has some insight on how to get it out.