Already made two custom PCB’s for the project, but im busy making one flight computer now. It should be flexible, and should be modular: so you can hook up some custom stuff. This flightcomputer will include; a Radiotransmitter, a GPS receiver, and a cellphone-module; all powered by a small arduino pro mini 3.3V version.
Also, i received my 70cm mobile antenna with magnetic mount for on the car. Small wire on it though. And i made my own R213 Coax cable with UHF plugs. Was it fun? NO IT WAS NOT.