Hi, Ive currently got two SB-900s that I trigger with my D90 in commander mode for some product shots in a cheap light tent. I want to expand the kit out to include a softbox and umbrella to start getting into portraits and a portable strobist setup. Thats the plan

So currently in my cart at Adorama Ive got the following:

2 x Manfrotto 6' Lightstand with 5/8" Mounting Stud
http://www.adorama.com/BG3373.html

Westcott Hot Shoe Mount
http://www.adorama.com/WESMMA.html

Westcott 28" Apollo Speedlite Kit
http://www.adorama.com/WEASS28.html

Westcott Compact 43" White Satin Umbrella with Removable Black Cover
http://www.adorama.com/WEUMB43WSC.html

I just want to check to see if theres anything obvious that Im missing? ie. Will the hot shoe mounts attach directly onto the lightstands or do I need some type of stud/clamp? Or do I need an "L Bracket" to correctly position the flash in the middle of the softbox?

I think Ive got the setup all sorted but just thought Id run it past the experts here in case Im way off track or missing something glaringly obvious

Many thanks to anyone prepared to offer some assistance