My situation is this, I already have a 2019 27in 5k iMac with 40gb of ram that's running its OS off a nvme thunderbolt3 500gb external ssd with 2800mbps read/write speeds that I have velcroed to the back of the stand. I also have a 2012 refurbished 13in MBP that I got in 2013 after I was blacked...