The 360 build that has more turns than Willow Springs

Hypereutectic... Use the big ring gap.. Or wish you had... That larger distance between the top & second ring plus the reduced diameter in that location traps heat in the top ring... Run the gap to tight & the ring ends butt... Ring ends butt & bad stuff happens.... You don't want any detonation with Hypereutectics either... They don't respond well to it...