XRAY - Model racing cars

Hello, in the set up book, for the rear low center adjustments, it is clearly explained that the low roll center is usually better for low traction tracks. I would like to know about the front roll center as well, as the set up book do not specify if it is better for low or high grip condition (in fact it seems that either way is good for high grip condition)

Lower
• Increases on-throttle steering.
• Decreases car’s responsiveness.
• Decreases weight transfer at front of car, but increases grip.
• Increases chassis roll.
• Better on smooth, high-traction tracks with long fast corners.

Higher
• Decreases on-throttle steering.
• Increases car’s responsiveness.
• Increases weight transfer at front of car, but decreases grip.
• Decreases chassis roll.
• Use in high-grip conditions to avoid traction rolling.
• Better on tracks with quick direction changes (chicanes).