I have both of these flashes and recently purchased a Lumiquest UltraSoft for my FL-600R. I'm contemplating also getting a soft box and am looking at the Softbox III. I know this softbox blocks the AF-assist light on most flashes, but some of the reviews say to tilt the flash up a click, and the AF/exposure-assist works fine. I'm wondering if the FL-600R is too small for this. If I'd only be able to use the Softbox III in manual mode, I'd go for a smaller box like the Lumiquest LQ-107. Re the Oly FL-300R, I realize this is a low-powered flash, but is there any type of diffuser that will fit this oddly shaped little flash? So far I've just been dialing down the flash power and using it bare. But it sure would be nice to diffuse it somehow. I'm open to both homemade and commercial solutions. Advice much appreciated.