I just found a nice compact way of unblocking a Router using a very small amount of room and so far its 100% effective.
1.Iron AND gate set to Items in inventory = Emit Red Pipe signal
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This is a nice System you have there

Routers are fast with speed upgrades maybe it is possible to let the timer run with a smaller time frame.
I will test this design...well a word from the author Neptunpink about the future of the mod would still be nice...hopefully with a real overflow system.