  We study the reflections of locally free Caldero-Chapoton functions
associated to representations of Geiss-Leclerc-Schr\"oer's quivers with
relations for symmetrizable Cartan matrices. We prove that for rank 2 cluster
algebras, non-initial cluster variables are expressed as locally free
Caldero-Chapoton functions of locally free indecomposable rigid
representations. Our method gives rise to a new proof of the locally free
Caldero-Chapoton formulas obtained by Geiss-Leclerc-Schr\"oer in Dynkin cases.
For general acyclic skew-symmetrizable cluster algebras, we prove the formula
for any non-initial cluster variable obtained by almost sink and source
mutations.
