Spent the entire time working on the CAD model in Onshape, for this version i decided to not obsess over the thickness as i encountered two issues 1) The Dupont wires and GPIO pins of the ESP-32 require a minimum of 20mm of height just to accomodate the wires. 2)there is no easy way to mount the electronics besides making a platform for the ESP-32 and the two other radio modules to rest on and it happens to waste potentially useful space.I need to now make holes for the antenna connectors , PTT button and the ESP-32 connection to the phone.