When you taking (mining) harvester platform from the base, you can take it several times.
Add check to the script for skip taking if already exists in the inventory.
This is actually a wanted behavior, as you don't get it back when the platform warps, so you can have some in advance already.
I can probably add a toggle option to prevent it if necessary.
I may change this later as I still want to add a way to get them from the GUI instead of having to mine them
Why not add them to shortcuts like it was done in main game with green/red wires?
If it is not possible, then could you please allow them stack. While it is really convenient to have several in advance, they occupy precious inventory space and that is reason to avoid pickup many.