We have found out that shortages displayed with red are shown maybe not the most comfortable way.
If you have planned several simultaneous gigs, the latest shows when there are shortages. That is ok. But if you have planned them in advance and they are confirmed in different order the situation changes. That will lead to surprises when earlier the list was ok and all of the sudden when packing it is not.
Also if you change anything in the dates of a already confirmed gig, the equipment list might go totally red and the reservations go to another gig that has been confirmed later.
There needs to be some kind of warning that tells earlier that shortages will become. Now it is too easy to think that everything is ok because everything WAS ok when you planned it. If you do not constanty go and check all equipment lists, you will not notice the shortages and you will be terribly surprised when packing.