I used:
LEGO tracks 2ea
LEGO 13971 Wheels 6ea
LEGO 47720 axle 2ea
2 continous rotation 9g Servos
2 5mm LEDs
Eachine TX06 Split FPV Cam
1S 380mAh Lipo
5V Step up converter
4 4x2mm magnets

Cut the Axle stubs down and glue them to the body.
Servos are snap fit without glueing.
Drill Drive wheels center out to 7mm and file Servo horns in shape and press them in.