I have 2 extruded tubes that end perpendicular to each other and I want to make a corner for the 2 ends or attach them to be one - can't seem to do it. any help would be great and you would be considered a legend in my book

PS I tried to attach the curves that make up the path for the extrucsion but it won't give me a clean 90 deg (perp.) corner when it make the transiton.

Thanks,
Moff