Even though I am not quilting my project with metallic thread, I put in a "metallic" needle, because I had some on hand, and they do have a larger eye to prevent fraying of delicate metallic threads. I figured it might work with my very fine 100 wt polyester thread.
I find that by changing my needle about every two hours, and loosening top tension A LOT, I am getting less thread breakage. I'll be able to finish my 15 blocks that have the metallic fabric.
If I ever do work with metallic fabric again, I would definitely choose another thread, probably 50 wt cotton.
Thanks for all your helpful comments. So much knowledge and experience out there ...