Stacker reclaimer enhancement

Stackers should have a second version which can be run on a rail (straight line only, no curves. This would mean the attacker runs very slowly up and down the tail to make a stockpile just like materials handling usually does. It’s like a Toblerone, lone and triangular. Mechanically this is just dumping like a truck at height, with a fixed path
You should then also have a reclaimer, which runs on a similar fixed, straight rail system that is able to dig from the top of the pile (reverse of the stacker). This should be limited to “loose” material.
You could expand into bucket wheel excavators over time of this type of mechanic was achievable.