  The unique maximal ideal in the Banach algebra $L(E)$, $E = (\oplus
\ell^\infty(n))_{\ell^1}$, is identified. The proof relies on techniques
developed by Laustsen, Loy and Read and a dichotomy result for operators
mapping into $L^1$ due to Laustsen, Odell, Schlumprecht and Zs\'{a}k.
