i agree chromium oxide makes a big differance to my razors. all i do is shave and if i think it could shave better i just take my razors to a 4k/8k 12k and then oxide and try again and if still not happy just keep repeating untill i feel a differance you just have to be patient.We all have differant strenghts in stubble you have to tune your razor to your beard. Switching from feathers to a straight will sound differant which can be quite decieving as a straight can sound like it scraping when in actualfact it is actualy shaving it takes a thew shaves to adapt.