Looks good to me!

any reason to think it isnt?

I think theyre called hershburg stirrers.
edit:
http://www.jce.divched.org/journal/Issues/1994/Aug/jceSubscriber/JCE1994p0718.pdf

These stirrers are mentioned on pp 64-9 of Vogel's Third Edition of the:

http://library.sciencemadness.org/library/books/vogel_practical_ochem_3.pdf

http://www.erowid.org/archive/rhodium/chemistry/vogel3.html

Textbook of Practical Organic Chemistry  They're superior when there's solids adhering to the bottom of a round bottom flask They're not manufactured commercially so most chemists are unaware of their existence 

The text from Vogel's:

A useful stirrer—sometimes termed a Hershberg stirrer— for efficient agitation in round-bottomed vessels, even of pasty mixtures, is presented in Fig. II, 7, 7. It consists of a hollow glass tube to which a glass ring is sealed ; the glass ring is threaded with chromel or nichrome or tantalum wire (about 1 mm. diameter). By sealing another glass ring at right angles to the first and threading this with wire, better results will be obtained ; this is usually unnecessary. The stirrer is easily introduced through a narrow opening, and in operation follows the contour of the flask; it is therefore particularly valuable when it is desired to stir a solid which clings obstinately to the bottom of a round-bottomed flask.

The image from Vogel's that's attached appears almost identical to the image in the first post in this thread    Vogel's also states that this design is sometimes called a Hershberg stirrer since that's the name of the inventor  What's particularly useful about the Vogel's text and the modification from JCE is that directions are given for a glassblower as far as construction   Whether the Organic Syntheses recommendation works as stated will have to be determined by experiment, but the procedures are checked and have been relied on by chemists for many decades     Arthur Vogel used Organic Syntheses as his primary source material even though no formal credit was ever given

The attached article describes the action of a Hershberg stirrer in the preparation of lithium sand as whipping   The picture of the whip stirrer from the google search and the Hershberg stirrer from Vogel's are virtually identical    That's all the information that can be found