What is the fastest way to create a 90° joint? I often want to create joints like this:



Since I end up making these more than a little, I'd like a fast way to do it (i.e. on the order of &lt; 10 seconds)

I've found a couple tools which come close to being the ideal solution, but I've had some problems with them as listed below:


When using the spin tool I usually end up having to fiddle with the location for a while in order to to get a natural curve:



Are there any techniques to expedite this process of fiddling?
The bridge tool is nice because I can precisely specify where both ends of the joint will be, however I often end up with subtly uneven joints, probably due to my initial mesh being not quite square.



Is there a fast way to correctly line up the initial edge loops in a way that will result in an even joint?
The spin tool is well suited for creating joins:


Spin Alt-R it works best (expected results) in orthographic mode. The selected parts of the mesh will be rotated around the 3D cursor. The 3D cursor should precisely set vie the properties panel N.

The last operator settings allow to adjust the angle and steps:

If you focus more on modelling speed than accuracy the the bend tool could also be useful: How does the bend tool work?