Hi Mellodrama:
I hope this isn't an annoyance. I am with iDEAL and read your conversations on our COB Holders. Thanks for mentioning. Newark now has all our holders and Arrow has our Cree stuff. Our holders use the stainless steel to hold the COB down. A paperclip can be used in the small keyway slot above the wire to release the wire.
Let me know if I can help.
LED Lighting Guy