I'm just starting to learn MoI so please excuse a newbie question.

I have a joint formed by the intersection of two extruded objects (they are just lay inside each other right now). I'd like to remove the extensions of the two where they meet to form a nice clean solid 45 join. I've played with various boolean functions and I get the cuts by merging but then I'm left with hollow extrusions. Both pieces are the same size (tho I find myself having to play with that in order to get a merge to work right).

Would someone like to walk me through how they would do it?

(As a meta question, is anyone offering online training - like with screen sharing or would be interested?)

Thanks,
Scott