A friend from the Facebook Pin Loom Weaving Support Group typed up the instructions for this pattern and gave me permission to share them here. (I haven’t proofread them, but I assume they’re correct.) Thank you!
R1 – Plainweave
R2 – P2, {U3, O1} x 2 U3, P9, U3, O1, U3, P2
R3 – P4, U3, O1, U3, P9, U3, O1, U3, P4
R4 – P6, U3, P9, U3, O1, U3, P6
R5 – P8, U3, O1, U3, P5, U3, O1, U3, P4
R6 – P6, U3, P5, U3, O1, U3, P10
R7 – P12, {U3, O1} x 3, U3, P4
R8 – P6, {U3, O1} x 2, U3, P14
R9 – P16, {U3, O1} x 2, U3, P4
R10 – P6, {U3, O1} x 2, U3, P14
R11 – P12, {U3, O1} x 3, U3, P4
R12 – P6, U3, P5, U3, O1, U3, P10
R13 – P8, U3, O1, U3, P5, U3, O1, U3, P4
R14 – P6, U3, P9, U3, O1, U3, P6
R15 – P4, U3, O1, U3, P9, U3, O1, U3, P4
R16 – Plainweave