I looked at the wiring and solder to the ESC's on a 2017 model mavic pro and a 2018 version. There was a visual difference in the wiring length type of glue used to secure the wiring from vibrtions and quality of the wiring at the soldered areas (jacket being burnt a bit etc.) The newer model appeared to have shorter wiring to the motors and some burnt jacketing near the solder points. The 2017 version appeared to be more precisely assembled. Which version would be worth trusting over the other? Is there a reason these appear so different internally? Also the 2018 version has silver rings around the bottom sensors instead of the graphite black ones.