  A generalized so called magnetically controlled ballistic rain-like
deposition (MBD) model of granular piles has been numerically investigated in
2D. The grains are taken to be elongated disks whence characterized by a
two-state scalar degree of freedom, called ''nip'', their interaction being
described through a Hamiltonian. Results are discussed in order to search for
the effect of nip flip (or grain rotation from vertical to horizontal and
conversely) probability in building a granular pile. The characteristics of
creation of + (or $-$) nip's clusters and clusters of holes (missing nips) are
analyzed. Two different cluster-mass regimes have been identified, through the
cluster-mass distribution function which can be exponential or have a power law
form depending on whether the nip flip (or grain rotation) probability is large
or small. Analytical forms of the exponent are empirically found in terms of
the Hamiltonian parameters.
