13 inch macbook pro retina bottom case foot

One of the feet on my 13-inch retina mbp is missing. Looking up for a replacement or an alternative for some time, but the result is not so good: either is not available in China, or is not suitable for 13-rmbp.

So I do it my self.
The 13-rmbp's foot is very thin and is hollow inside, like a shell, so as to absorb the shock. And there is a central pole to bear the weight of the mbp.

I followed this principle. Although the PLA is harder than the rubber-like material used the old foot, I th