Used to work live line out of mini versions. Versalift, I think the were called. Can't really remember a time when they felt safe at forty five feet, let alone the heights you might have been hitting.
I used to operate most of them we had in the yard, but my own was a 35M. They offered me the 72M which at the time was the biggest in Europe, but it meant too much time working away(months at a time with virtually no notice) and the mrs put her foot down.