Version 4 ... hopefully the final tweaks have been applied for a little more tolerance side to side for the board and around the opening for the USB port. This should ease assembly. The last revision worked but it could have been better so I made it better! This is designed to work with the Evolv Micro-USB charging board and to be installed from the inside of your case. It was built for use on cases with a typical 2mm wall thickness. The opening required in the case is 15.1mm by 7mm, which is slightly smaller in one dimension and slightly bigger in the other from the last revision. That required opening is 3mm up from the bottom of the base. I raised it like this to get above various case lips and interior rounded edges. The combined set is limited to the "strong and flexible" plastics because the detail plastics have been found to be a little too brittle for the flex needed to install the clamp. Both parts are also available individually so that you can purchase the base in metal or any of the other available materials. I have samples ordered and will post new photos after they arrive.