Lettuce production seems to have very little overlap with growing weed: Lettuce grows to a few inches, racks tooled to the height of lettuce wouldn't fit hemp. Hemp has big root systems, it won't grow in tiny little cup mediums like lettuce will, it needs lots of space, mandating a different hydroponic approach than lettuce does.

Tomatoes, specifically determinate tomatoes, expect almost the same nutrient mix as hemp, has the same size root systems and grows to about the same height. Harvesting is also similar.

Hence: If they were planning to retool for weed, why are they building manufacturing capability for a completely different kind of production?