Mine came out at 4.54 kilograms well under the 5 kilograms. I was using a OS140RX with a OS header and a ES Carbon pipe and landing gear. I used the stock Aluminum Wing tube.
Jr 7005 servos on Ailerons A futaba 9402 on rudder Can't remember the throttle and elevator servos. The elevator servo was full size can't remember on throttle.
The MK Bellcrank i bought at Central was pretty light. My scales do not read that low, not accurate anyways.
I used a Hitec Super slim receiver. Nothing exotic or lightweight for sure.