Dave,
You are probably thinking of John Pace's mod to extend the operating handle of the Super 7 topslide, such that the topslide could actually lie parallel to the cross-slide, the extension being 5.7" long.
His S7 is a later (than mine (and Harold's)) version with power cross feed and the end of the cross-slide sticking out well beyond the slotted table part
This was featured in MEW issue no 206, Sept 2013, page 30 – 32.
PM me if you want any more info.
Phil
Edited By Robbo on 14/04/2015 20:40:01
Edited By Robbo on 14/04/2015 21:00:01