I'd like to get a 50 wescott too. i think they are a tad cumbesome with the front diffuser panel access point. Nice thing is they open up quick. Indoors I think they work better because theres no wind. The way the shaft sits in the umbrella shaft holder the box can still spin a bit unless you cinch the thumb screw tight (leaving dimples in the shaft).
I guess this is when an umbrella actually works well to fill.Less control of light with an umbrella but it really depends if your just wanting to just get fill.

