Soil Blockers for 1020 trays
thingiverse
Variation on the 4X large soil blocker made by BasD Soil blockers made specifically to do 1020 trays. 5x2" soil blocks 6X1.5" soil blocks You will need the screw in nubs from https://www.thingiverse.com/thing:4242649 Print 6X file at 75% size to get the 1.5" size, the screw in nubs need to be printed at 75% as well
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