I'm not sure how I did it, but I put a row of five keys to the right of the space bar, instead of four keys. The layout I was originally following was for a 40% keyboard, but I've ended up with one extra key. Does that make it a 41% layout? I suppose it does. 

In typing on this keyboard I miss the apostrophe key, as well as the exclamation point. I always forget when I fall in love with 40% layouts that they sacrifice some really important keys. Perhaps I will code in some replacements. Make use of the 1%.