A total of 1 review of this product on Reddit.
12th Dec 2016
Unfortunately not, you’d need 1u key caps to replace the winkeys on a K70. these are 1u, also from maxkeyboards, but unfortunately they’re cherry profile, so they would be lower than the other keys in the row.
edit: [https://www.amazon.com/Max-Keyboard-Backlit-Novelty-Puller/dp/B01L8J0BA0/ref=sr_1_2?s=pc&ie=UTF8&qid=1481517473&sr=1-2&keywords=portal+keycaps](Amazon) also has the 1u set in stock, for considerably more though.