As Alex said, Prototype is being sent to him tomorrow for him to test. Was hoping to have it tested by now but have been let down by the local mini club. Will update here asoon as things progress. In the meantime, if people who are interested could let me know the following information:
Phone Model
Is your phone fitted with a rubber cover
Preferred Colour
I can then start to print some different cases ready to go for when the mount size has been confirmed.