I'm wondering if using the small USBA-USBC adapters on the end of existing cords/thumbdrives is going to block the neighbouring port? I was planning to just get a few of those and leave them on my existing cables but maybe I should reconsider and just buy new cables instead. I'm only needing to plug in up to 2 external 2.5" HDs and a memory card reader at a time. That said I do already own a 3 port USB hub for my 12"rMB but it gets a little flaky with power pass through. On the MBP I won't have to use the power pass through. Decisions, decisions....