For those of you looking for better flash bracket solutions, you might want to try Brent’s DIY flash bracket, which according to him, helps your wireless sensor remains unobstructed:
The point of this bracket vs. directly mounting the flash the umbrella adapter? It’s simple – the optical wireless sensor remains unobstructed. For instance, when using my ProKit softbox, the wireless sensor on the Speedlite is blocked, so getting the pre-flash signal to it is a challenge. But with this bracket, the softbox goes on, and the sensor is lying back there free and clear,