Ti2MnFe5B2, P4/mbm, Ti3Co5B2 type with Mn on 2a. Built by substitution into a Materials Project prototype and relaxed with Orb v3 on Ouro. Energy above hull 0.0 meV/atom on the Orb v3 surface; no imaginary phonon modes; absent from MP, Alexandria, GNoME and COD. ML-only: not checked with DFT.