Too late now that you have 5 crush washers but
TPO Parts has a nice aluminum drain plug with a nitrile O ring and neo magnet. No need for a crush washer and it's drilled for safety wire. It's $20 if I remember correctly. They are great to deal with. Turns out the 2010 Hyper uses the 1098 style plug. I had mine for months before I was ready to use it and they exchanged it no problem.
Michael