update: November 2015 – this post was getting quite a bit of traffic on my old site (now closed), so I’ve migrated the page to this new address. Original post [June 13, 2012] : Some pics and a short video describing the modification for the Nikon TC-14E II (1.4x) Teleconverter to be used with non AF-S lens (including third party). This modification will void your warranty so you do so at your own risk. Based on the excellent info provided at Christophe Heyman’s page.
Photos of the procedure are available here.
Update April 2018 – a few photos are now here.