So I live outside of the US (in another English speaking country), near where I live is a large cricket oval that is rolled and very well maintained all year round. Really nice to run on. I was thinking of buying a pair Vaporflys for reps and tempo training on it but because of the stack height, they aren't the most stable, so I've held off buying a pair. But elites do most of their track work in Vaporflys so they are probably stable enough. Thoughts, advice.