I was shooting a triathlon yesterday and it would have been nice to have the option to use a flash as a fill at around 4fps. Is there any compatible system that can recycle that fast? Obviously over heating is an issue if you over do it. My Metz won't recycle that fast at even 1/4 power. My Godox AD360 won't go below 1/8 power in HSS, so it won't recycle that fast either.