In my planning for the late April arrival of my PM25MV, I've started assembling the tooling I think I will need. I sprung for the vise/clamping and collet set for starters. I've also purchased from FleaBay an R8 key-less chuck and R8 2" boring head and tools. I'm on the lookout for used R8 tool holders, (I was taught that collets were for work holding, not tool holding. Collets depend on friction to hold the tool, tool holders have set screws.) I'm planning a plate to put on the mill surface that can be pivoted to 1, 1 1/2, 2 degrees etc. angles, planing ahead to long tapers, part of my tooling for the production I'm involved in. (so far I've done them by scribeing a line and filing to it. I'm also on the lookout for small, 1/8 to 3/8 end mills.
I know there are other needed items, but my 30 years in toolmaking has supplied a lot of them.