Friend slot is very useful when you want to upload a file very quickly to a friend, especially when he is downloading a rare file just to help re-seeding it.
Unfortunately not everybody is online 24/7, so when he will reconnect you will have to give him the slot once again. Is there any way to automatically remember the friend slot? With eMule Xtreme/Morph I didn't have such a problem, you had to keep the friend upload lower than $percentage to avoid penalties but it did work. Is there any way to remember the friend slot when someone else reconnects? Even an out of tree patch would be fine, I don't pretend such a feature to go vanilla because I understand it would require a better friend upload management.