I have used the BQN parts in in-extensively so far but I am impressed by the effort - including the incorporation of special symbols. I will provide an update after more extensive use of BQN & testing of K. A very good start otherwise: Update: in BQN calling upon named assignments using <- throws an error name ← ↕4 ⟨ 0 1 2 3 ⟩ name Error: Undefined identifier ./:1: name ^^^^ "Error: Undefined identifier ./:1: name ^^^^"