I have read all of the guides for how to talk to goldbob and the steps to take before that like going to the far outpost and such. I've done all of that. However, when I try to talk to goldbob all he talks about is how there isn't a train store in Poshley Heights and that he'll have to build one.
He won't ask me about the cannon, no matter who I have out for my partner. (I know that you're supposed to use the bomb, but I've tried them all multiple times). Can someone tell me what I missed, or what I'm supposed to do?