In fact, a standard plate mounter is usually not designed for handling rolls over 100 kgs, so there is a structural limit due to the weight of the rolls.
The simple operation of loading the cylinder cannot be the same like a normal mounter: the standard mounters for Flexo industry have the rolls loaded in the working position, which is perpendicular under the cameras.
This can be a very tight fit with the possibility of damaging the cameras.
If these rolls have been adapted to work with sleeves, this makes it even more difficult. A sleeve change-over of a 400 kgs air mandrel can be very complicated.