How do I tell if my nut slots are too high?

nut slots - Discussion Forums nut slot depth Stainless steel, robust tool · Perfect size to fit in-between standard and bound fretboards · Works on flat nut slots, , 12, and 16 radiuses · 35mm x 35mm nut slot files which i perceive as insane The nut length is 42mm Is that normal? did he do it on purpose? or because he had no proper nuts

nut slot height I overheard a conversation where a luthier mentioned that nut-slot depth might affect how the string sounds Specifically, he was cautioning