The tailwheel mount shares several bolts with the vertical stabilizer spar, so before you can put any substantial weight on the back wheel you have to install the vertical fin first. I've had the tail propped up on a pile of styrofoam insulation for a long time, but now it's time to get this thing standing on its own feet, or wheels as the case may be.
To provide the proper amount of vertical stabilizer offset, there is a single AN960-10 washer between the spar and the up-elevator stop, on the left side bolt only. This photo confirms that I did remember to install that pesky washer:
I torqued and marked all the bolts that attach the horizontal and vertical stabilizers:
I couldn't get a socket onto some of these, so I just tightened them using a wrench and German torque.
More bolts:
I couldn't get enough access to the nuts on these bolts to apply the orange torque seal goop, so I just marked the bolt heads to remind myself that I did actually torque the bolts.
The horizontal and vertical stabilizers are now mounted permanently, and the tailwheel is capable of supporting real weight. You can't really tell from this photo, but the tail is now resting on the tailwheel instead of sitting on a pile of foam.