Originally Posted by
choisan
my friend always told me to add an external capacitor other than the hobbywing xr10pro hd built-in, is that really a need or improvement to run modified 3.5T?
It's not critical, but the external capacitor can help reduce temperatures, at least it does in my experience, but usually not enough to be safe without a fan. If you need to pick just a capacitor or just a fan, take the fan. They make 20mm fans.