Check the option parts that Multiple Czech National Champion and EOS podium finisher Max Gotzl has been using at his XRAY XT2'21. Max explains also the benefit of each part, for which track conditions they should be used and what performance improvement you will experience
Alu Front Lower Arm Mount 23°/29° Kick-Up & Brace #322313 Arm Mount #321211 Brace
>>> The brass arm mount makes the car more stable and have better landings. Because of the size of the car, it's the best to have the weight in front.
#326181 Stainless Steel Battery Weight 35g
>>> This battery weight is much recommended on high grip, it helps with landings and makes it stable going through the corner.