No shredder blades on mine. I have a pto driven chipper on a JD 1025R tractor. There's four blades on the rotary wheel. The blades are 150x50mm and about a half inch thick. They are reversible so there are two bevels on each blade. I've researched a lot of mills and I like what I see on the LMS 4190. I hope you're right about finding uses for it, because I'm scared to death it might end up as an expensive garage ornament.I don't have a recommendation for a mini mill, but once you get one you will find lots of stuff to use it for.
How many blades does your woodchipper have? and what are the dimensions of the blades? That is all going to come in to play when it comes to what size mill.
My woodchipper has 4 Chipper Blades and 36 Shredder Knife Blades. Mine are double sided but still it would be a lot of work to make the 36 Shredder blades on a mini mill. I bigger mill would sure make it a lot easier.
Thanks for replying. Happy holidays to all.