Base availability on theoretical inventory

When building quotes or pull sheets, I would like the option to base the availability on our actual known inventory, ignoring any over due issues.

The problem I frequently run into, is that flex starts its availability calculations based on the assumption that overdue items aren't coming back, so if a couple of cases haven't been scanned back in yet, suddenly my shows I'm planning for later look like nothing is available.

Now sometimes, that's useful:  I mean, if I'm trying to plan a show for tomorrow, yes, I want to factor in the overdue item.  But if I'm planning a show a month out?  *I don't care*. Either that overdue piece of cable is coming back, or I'll have it replaced.  Either way, I want to be be counted as one of the cables I can use.

I know it can be worked around to some extend, by adjusting the return dates of the overdue shows, but that's a clumsy work around, not really a solution, IMO.