This is a situation where you either have to deep copy or handle the complication of updates.

A current source which controls and consumpts the load current depending on the model.

Feeding the sliver in via precondenser and condenser to the feed tray has technological implications, since depending on the sliver weight and volume along with fiber/fiber and fiber/surface friction, a positive sliver tension can be achieved or, in a negative case, an undesirable misdraft.

In Cheyenne in 1883, a Dr. W.A. Wyan tried in vain to save painted lady Sallie Talbot.