One problem I've had with my speedlites over the past few months is getting the mount on my umbrella softboxes to work correctly with umbrella softboxes. Umbrella softboxes pose a problem because the standard umbrella bracket mount for light stands doesn't allow you to point the strobe directly in the middle of the umbrella, which is pretty much a requirement for using the umbrella softboxes..
Having recently bought a 60" Softlighter II, I needed to hack together a 90 degree adapter that would allow me to insert the speedlight into the opening of the 60" Softlighter diffuser cover. There are other solutions available but they are pricey.
Today I was able to come out of Home Depot with an elegant solution that cost my less than $8.50 including tax (and no shipping) for total for 3 sets of 90 degree adapters.
Step 1: Materials & Tools Needed for Making a Strobe L-bracket from Home Depot
1-1/2" Corner Brace
1/4" - 20 Wingnut
1/4" - 20 x 1/2" Machine screw(I think a 1/4" long one would have been ideal but I couldn't find any)
1/4" Cut Washers (I used 3 because my screws were a bit too long)
Everything pretty much screws together...Tools you need:
Phillips and Flat head screwdrivers
A Socket wrench with a 1/4 bit
* The holes are a tight fit so you might want to use some gloves too b/c brute strength might be necessary