UPDATE NOV 2013:
Photix now sells a 16″ multiboom, this will solve the tilt issue instantly, a very nice solution. Source: http://flashhavoc.com/phottix-multi-boom/
To solve the tilt problem with the Westcott 28″ apollo softbox I constructed a bracket for two flashes. Why for two flashes? well that gives me more power and faster recycle times. To start with this is the end result and makes for a 45 degree angle.
This is what you need;
Two L brackets (from Home Depot or any other home improvement store) , a brass monkey, two cold shoes and a bold and a nut. In this picture I show the bracket upside down. The brass monkey will fit in a umbrella bracket.
This shows the bracket with a wireless trigger and a slave trigger. The brass monkey points towards the back of the softbox.
This is how it looks when the combination is placed inside the softbox. I left the zipper open so you could see how far you can tilt the softbox. By using this bracket you can stick the rod further into the umbrella swivel and that’s the whole reason it can tilt more. I can imagine to make a similar bracket just for one flash.
Please use the comments for questions and have fun building this.
The Phottix Multi-Boom 16″ Flash Bracket mounts in a standard umbrella swivel, holds two flashes on axis with the umbrella shaft, and allows the softbox to be tilted.Umbrella softboxes are greatlighting modifiers. Easy to transport and use, fast to set-up – butthere’s one big drawback: Because of the design they are almostimpossible to tilt on a traditional light stand. The Multi-Boom takes care of that!Multi-Boom Features:Mount one or more flashes with the heads centered inside umbrellas or umbrella-style softboxes for more even light output.Places the umbrella swivel outside the softbox, allowing much greater tilt angles and fast easy access to the swivel handle.Mounts in an umbrella swivel or in a grip head.Allows full 180 degree tilt with softboxes up to 90 cm (of 36″) in height or diameter.Fast and easy set-up, base plate swivels and locks into position with one simple thumbscrew.Quickly folds flat and compact for transport. Carrying bag included.Mount the baseplate in multiple positions for different flash layouts, or lower center of gravity.Hand grip allows for holding of flashes mounted in a shoot-through umbrella or similar modifier.Large, easy-to grip-thumbscrews are captured in the slots – no worries of lost thumbscrews.Folded flat, the bracket acts as a base stand for 2 flashes to sit on a flat surface (floor or table etc).Solid all metal construction is simple, strong and long lasting with lightweight 6061 machined alloy material, with hard wearing black anodized finish.Upright flash mounting is ideal for hotshoe mounted radio triggers.Eye bolt handle grip provides easy access to a handle outside the softbox, as well as a point to attach battery packs or small counterweights.Using the base plate from a second Multi-Boom bracket allows for quad flash mounting, or two flash units and 2 battery packs.Also available as a combo with Multi Boom 16″ and Phottix Varos II BG Umbrella Adapter.