Well, the 16ft extension cable is long as f*** but it fits perfect and works like a champ. Just coil up the excess length in a pile. Oddly enough "Up" on the cable is down on the TG-16 connector, not that it matters. The cable has a decent wieght to it, about the same thickness as a standard TG-16 controller cable, only slightly firmer possibly due to the additional shielding.
For the price of two or three TG-16 games, I got an Everdrive from Stone Age Gamer, which I promptly loaded all 365 Jap and US ROMs onto. Now I can sit back and relax and play all the games I want in total comfort, but I still have to get off my lazy rump and manually reset the Everdrive to switch games - oh boo hoo!
FYI, I rechecked the link and sadly they appear to be out of stock / backordered on Chrutchfield, sorry...