We provide a technique to find a cluster-tilting object having a given cluster-tilted algebra as endomorphism ring in the finite type case.

Let R be a split extension of an artin algebra A by a nilpotent bimodule ${}_A{Q}_A$, and let M be an indecomposable non-projective A-module. We show that the almost split sequences ending with M in mod A and mod R coincide if and only if $Ho{m}_A(Q,{\tau }_{A}M)$ = 0 and $M{\otimes }_{A}Q=0$.