As an FYI the Delta Plastiks Porsche 917 body is wider than this Rlaarlo car. The delta body is not a great fit for this car unless you are ok with a gap or wanting to use wider tires like the 45mm drag foams then it may be a good solution.
Nice build so far.
As an FYI the castle ESC fan is controlled by a internal temperature switch and only comes on when the ESC gets hot.
I believe Rx gyros and futaba gyc gyros are quite different in overall function at higher speeds. I hope the setup you have works well for you.