Actually, the Glider was on sale as early as 1989. In terms of a line-up, the Twin-Turbo range was essentially replaced by three new Glider models and sales of the Twin-Turbo stopped around early 1990. For some reason, Electrolux then put the basic Twin-Turbo back on sale in late 1991 and as stated, it carried on selling into the mid 1990's.
The first Glider models were white for standard, blue for electronic-boost, and pink for autoflex. As was the case with the Contour when it came out around 1991, the electronic-boost controls were replaced with electronic slider. I don't know why this was, but what I do know was that the boost (which gave all of about 15 seconds of extra power) was a futile function, and the control was not near the handle at all, so by the time you have pushed the button and resumed a cleaning position, you'd probably wasted several seconds of that boosted period. Funny thing was, the both the Glider and Contour was boosted to 800watts from 600, but when the electronic boost was replaced to a slider control, the Glider stayed at 600watts max, whereas the Contour was 800watts. I do not know whether the boost function was taken off the pink autoflex cleaner as it was not available for long and I have never seen one for myself.
The biggest change to these cleaners came in 1994 when a foot pedal was added to operate the handle release. Prior to that, the cleaner front had to be held down by foot, and the handle yanked back. This actually wore out the mechanism which held the cleaner upright, hence the change. After the first three models went off sale, there seemed to be several variations of the same basic theme. More than I can mention as there seemed to be so many over the next few years. The last one I recall was caller powerglide or something like that, this was in the late 1990s and had no height adjuster to it. It was incredibly hard to move about.
)
