Got this oldtimer (easy to get the model) with a nice ultrabase and a replicator. Makes altogether a nice sandwich

The way the base and dock can be stacked on each other is interesting. It sucks that the later iterations can't stack, especially with the slice battery and Ultrabase being around on the X220/30 and both shaped to cover the whole base of the machine. Though I imagine someone would want to try and abuse the system by making a tower of slice batteries and Ultrabases

That's why I took the pictures. It's indeed funny