You weren't kidding, that thing looks great.
The filter can be seen from the bottom side, coming from the hydro pump, with the top facing the front of the tractor. Hard to miss, unless it's covered in dirt/oil sludge. It looks just like an automotive oil filter but it's not. It's a hydro specific filter and can be found at places like NAPA.
Google your Cub model for the hydro filter number, or someone will be along shortly with the number fresh off the top of their head!
