I have both a 20D and 1D Mark IIn and have Stroboframe folding flip brackets for both. I have been using a 580EX flash and a Canon Off-Camera Shoe Cord 2 and am wanting to go to a 430EX and am wondering if using the ST-E2 wireless transmitter is a good choice to use when my flash is on a bracket above the wireless transmitter? I know it can work with the flash in front of the camera, but can the flash be hidden or does it have to be in line of sight to set off the flash? If any one has a ST-E2 and can tell me if this would work, it would help me alot in deciding what I am going to do.