I recently got a Yongnui 568EX for my Canon t3i and am generally very happy with it, but I do have one issue: High speed sync only seems to work when the flash is physically mounted in the hot-shoe. When using the flash wirelessly the camera only lets me go up to 1/200 just like with the onboard flash. Is this a limitation of this particular flash, or any wireless flash with this camera? Can the Canon 430EX or 580EX or 600EX perform HSS with wireless? I'm generally bugged that the T3i won't let me choose whatever shutter speed I want - so what if the photo doesn't come out right, I want to play with the settings. Thanks for the help!