Originally Posted by Colin500
Not sure what you mean by "reversing (the inclusion relationships of) the timing"?
Did you mean to switch from 1st curtain to 2nd curtain? If so, that method shouldn't work from what I read. I believe it'll switch from the "strobes firing at the moment both curtains become fully open", to "strobes firing at the very end right before fully open curtains begin to close". You will need "strobes firing when the first curtain begins to open, until the second curtain closes" and you can only get that with HSS enabled canon flash on hotshoe (or off camera with ST-E2/cable).
Unfortunately the camera will not go into HSS mode with radiotriggers on its hotshoe []
Originally Posted by Colin500
You'll only be thankful down the road []
If you choose to go outdoors, just get some portable batteries and you'll be having a blast overpowering the sun!