Hahaha good to see you back. That post isn't a surprise, wirtgen have those special pieces you love to hate.
I remember the old 500 series, if you didn't take good care of that inside ski it loved to push up into the fittings into that cutter drive motor and poof you were done. I had the pleasure of going to pick them up in that shape. Of course nothing was ever capped or plugged. With a Landoll trailer, the real fun was when you got back to the shop. If I described the feeling of sliding down the deck....well....scary doesn't quite make it.
Did wirtgen cover the replacements?