Bit of a long shot

An option to do a quarry mode, rather than pit mine.

1. Mine height above Tower to 0.
2. Place Retaining walls with ramp (Wait)
3. Mine 5 layers of selected resource

Repeat 2/3 until enough layers is complete.
Possible optinon to reverse and dump from Assigned Inputs, remove retaining walls for that layer, then repeat.

Calculating the layers needed would be a challenge, especially adding ramps down