Use a Wand Focus: AE Wrench on a empty Thermal Expansion cache, and it will deposit a certus quartz wrench into that cache.

I can confirm this bug. In the code for the focus is a condition to ignore the using on TC's pedestals. This can be further improved to test for caches. If it is a cache just set player's sneaking to false. This will do the job and the cache rotates as expected. My testing code was:

else if(te.getClass().getName().contains("Cache")) { 
            player.setSneaking(false);
        }

I think there could be something like a soft-dependency for TE, but I'm not experienced enough with forge yet.

This damned wrench focus just keeps finding ways to dupe wrenches...