Choice of equipment for distilling I need to distill some reagents, and the book Purification of laboratory chemicals suggests first refluxing over $\ce{P2O5}$ for several hours before distilling across. 

The obvious choice is a solvent still head like the ones used to distill THF, but I don't need very much of this so it seems wasteful. 

The way suggested that I do it is to set up a normal reflux, let it cool, and then quickly change the condenser for a side arm. This will obviously work but seems like a lot of effort. I think there should be some other piece of glassware to allow this process. Is this the case?
http://www.sigmaaldrich.com/catalog/product/aldrich/z516333?lang=en&amp;region=US

This condenses, and depending on what you have the knob turned too will either send it back to it's origin or to a collector. (I think, I have something similar in my lab but the link doesnt have a great drawing)