While still waiting for the TX/RX to arrive, I started to design and build the HEXA frame for upgrade     each arm is made of 14x14mm 1mm wall square tube, arm length: 40cm from center, 80cm from motor to motor. center plate is 16cm dia., two 2mm thick plates.     Also, i have done weight calculations and measurements:   Frame: 470g camera mount: 460g motors: ~500g battery:~500g DSLR camera: 950…