Finally this is impossible, become possible to flash studio flashes with more than 1/250 :-) (max 1/8000)
Have the Elinchrom D-Lite-it 4 and Canon 5D.
The most ingenious is that it works with the combination Yongnuo YN-622C + Skyport so you only need one YN-622C and the other flashes to triggers with the Skyport :-)
Flashes with lightning system works fine. (ETTL)
Price performance ratio is perfect.
From me a strong buy recommendation