1. Shock oil really depends on ambient temps, and how you drive, I use 45 all round in the summer and 30 in the winter.
2. Tamiya AW grease, nice and sticky, and I run with an extra diff shim behind the planet gear on one side in the rear to make it a little stiffer.
3. Just plug them in, if the motor runs backwards, swap two over on a sensor less motor to change direction.
4. I run TG10 anti-roll bars front and rear for less body roll and set up with 12-14mm ground clearance on HPI Pirelli tyres (16mm on rally blocks)
5. RX in a balloon if it isn't under the inner body cover.