  We derive a new open string field theory solution for boundary marginal
deformations generated by chiral currents with singular self-OPE. The solution
is algebraically identical to the Kiermaier-Okawa-Soler solution and it is
gauge equivalent to the Takahashi-Tanimoto identity-based solution. It is
wedge-based and we can analytically evaluate the Ellwood invariant and the
action, reproducing the expected results from BCFT. By studying the isomorphism
between the states of the initial and final background a dual derivation of the
Ellwood invariant is also obtained.
