Logistic Robot Train Waggons

[nobodx]

I#m not sure if this has been suggested before, but before this idea is lost, i'll write it down here:

Logistic Trainwaggons as an upgrade to the normal ones, with an integrated roboport.
+The waggon has a smaller inventory-size than the normal one, because it have to fit the roboport + logistic robots.
+It acts as a passive provider chest.
+Only it's own robots can grab its content
+The network coverage of the waggon is small so it's drones won't run accross the entire factory
+Between leaving a station, and actually leaving the station the train should wait so the robots can retun
+The waggon features batteries to recharge the robots (which in turn nust be recharged at the stations)
Loading into the waggon should only be possible via inserters.

Thinking of it, a requester waggon would also be an interesting alternative, with the same limitations, but loading / unloading should be reversed.

Costwise, it would be something like
+ 1x waggon
+ 1xroboport (maybe portable roboports (mk2?)))
+ some steel
+ multiple batteries
+ a passive provider / requester chest

In practice it would work like this:
The train enters the first station, the provider-waggons logistic robots swarm out to deliver to the nearby requester-chests while the requester-waggons bots pull from the nearby provider-chests.
The train then prepares to leave, all robots return to their waggon.
Once the robots are back in their waggon, the train leaves the station on its way to the next station.
...
One of its stations is a transfer /supply station
The Train enters the station, and (stack) inserters refill the provider-waggon, while the requester-waggon will be emptied with no interaction from the bots at all.