  Recently, we constructed the first-principle derivation of the holographic
dual of N=4 SYM in the double-scaled $\gamma$-deformed limit directly from the
CFT side. The dual fishchain model is a novel integrable chain of particles in
AdS5. It can be viewed as a discretized string and revives earlier string-bit
approaches. The original derivation was restricted to the operators built out
of one of two types of scalar fields. In this paper, we extend our results to
the general operators having any number of scalars of both types, except for a
very special case when their numbers are equal. Interestingly, the extended
model reveals a new discrete reparametrization symmetry of the "world-sheet",
preserving all integrals of motion. We use integrability to formulate a closed
system of equations, which allows us to solve for the spectrum of the model in
full generality, and present non-perturbative numerical results. We show that
our results are in agreement with the Asymptotic Bethe Ansatz of the fishnet
model up to the wrapping order at weak coupling.
