  We show that a vertex in the reduced crystal is i-external for a residue i if
the defect is less than the absolute value of the i-component of the hub. We
demonstrate the existence of a bound on the degree after which all vertices of
a given defect d are external in at least one i-string. Combining this with the
Chuang-Rouquier categorification for the simple modules of the cyclotomic Hecke
algebras of type A and rank e, this would imply a version of Donovan's
Conjecture for the cyclotomics. For e=2, we calculate an approximation to this
bound.
