I've had the Platinum MC since August and I am awaiting my CLI to $500 from $300, this should happen between Feb-March.
How can I go about getting a PC to QuickSilver? Also, should I wait to do this after I get my CLI?
A quick way to try is their upgrade link. See if there are any offers available after logging in.
You can always just call them and ask. Back when I had a Platinum, I just asked them if I could change it to a QS and they did. As for the CLI, maybe wait until after you get that to PC it to the QS. Cap1 might get weird about giving a CLI on a “new card.”
When I PC'd mine I did it over the chat feature on the Cap1 website. Very quick and easy.