IMO you might as well do a kickstarter and start official "beta" discussion threads with detailed pictures on every friendly hardware site. doesnt matter if the feedback from posters is good or not, as long as they are talking about it. set the kickstarter to have as modest a monetary goal as possible, and make all the sponsorships except the very lowest one be credits toward buying the final case. use forum feedback to set the optional monetary milestones, where more money = more requested features and options.