The purpose of this project is two fold. First it allows me to test out a new idea for mounting a DIY softbox to a light stand and secondly it lets me answer a comment made on my previous large DIY softbox about the best type of lining material to use when 'doing it yourself'. The idea of building a prototype testbed is that it allows ideas to be tried out on a smaller scale and in a simpler fashion than if you went ahead and just built the final version straight off. From this prototype I now have a set of plans to build a large, lightweight, collapsible softbox that should be easy to mount on a light stand. It should also be quick and easy to attach and remove a small flash. For anyone interested, I have included the build instructions in the comments.