An easily detachable, magnetic dome diffusor for the larger sized B1/B1x strobes would be really useful. It would create more even light across softboxes, or any modifier designed to make a larger, softer source.
If this were coupled with a clear glass cover to replace the stock frosted one, you probably wouldn't lose much power from the strobe.
The diffuser on my A1s are constantly falling off at events. Since they stick out further and are more easily bumped, particularly when my camera is hanging from my strap, they really need more/better magnets.
