i was looking on proctorjones.com and there's the 3 models of the spk, but i see no mention of the foils. also no mention on sia. anyone know for sure? i'm not in the market for new boots, i just like to know these kind of things. the foils are a classic, so the spk pro had better meet the standards to take the foil's place as an all-mtn. jibbing boot.