Thank you for the contribution and your part to keep the Community secure.
I would recommend to Split the Master Key in three Parts. Write down part 1+2 on a piece of paper anotherone with the parts 1+3 and a last with the parts 2+3.
Now store the papers in different places. In case of a Fire or theft you are safe. You just need to have 2 of these papers - doesn’t matter which one.