Orlik's integral diagonalization conjecture for weighted homogeneous monodromy

Assume $Y={\mathbb C}^{n+1}$ and that $f$ is weighted homogeneous. Let $C$ be the matrix of the monodromy operator $h_*$ on $H_n(X_\delta,{\mathbb C})$ with respect to a basis, let $\mu$ be the dimension of this homology group, and let $I$ be the $\mu\times\mu$ identity matrix. Orlik's conjecture. The matrix $C$ can be diagonalized over the integers: there exist unimodular matrices $U(t)$ and $V(t)$ with entries in ${\mathbb Z}[t]$ such that

$$U(t)(tI-C)V(t)={\rm diag}(m_1(t),\ldots,m_\mu(t)),$$

where $m_i(t)$ divides $m_{i+1}(t)$ for $i=1,\ldots,\mu-1$. This would give an integral Smith-type decomposition of the monodromy matrix in the weighted homogeneous case; the source provides no resolution of the conjecture.