Hey there, got a iMac I want to upgrade a little bit and have a few questions I can't find completely solid answers to. This has just a 1TB HDD in it. Too slow. I need SSD. Preferably NVMe. If this machine was purchased without an NVMe drive - if I open it up will the slot for NVMe still be there? If I open it up to put a NVMe drive in I'm going to replace the HDD with a 5TB. Ok to just swap the drives in place? Won't make the fans go crazy or anything? If there's no NVMe slot then I'm just going to rock an external SATA SSD. I'd love to connect it to Thunderbolt but I run the iMac + dual Acer K272HUL 2560x1440 monitors. Right now each one is plugged in to its own separate TB (mDP) port. I tried chaining off one of my monitors but all it did was mirror the two external displays with each other. So all three were working but I couldn't extend the chained monitor. Is this expected for this model? No DP 1.2 support? Or am I missing something? Thanks in advance.