I like the case a lot. It surprised me as it was bigger than expected and than it looked like, but I should have seen it coming. For one, it has room for a full-blown PSU (and I have the PicoPSU), and for two, I picked it because it has room for 6 3.5" HDDs.
But it's still pretty small, it's nice enough that my wife would let me keep it in a living room :)
Thanks! Yes, getting some hardware work done is always exciting, like a kid with a new toy!
You're right, the cost is about 320€ without the disks, not something to throw away if you already have a working solution. But if I wanted to wait and get used parts (like case, board etc) and only get new disks, it would probably be even cheaper. I left a cost breakdown in a comment above somewhere, if you want to do some calculations and sell off that Synology. You would probably need to add some money anyway, but hey, that's why we have jobs so that we can have toys :)