Thanks Edder,
you have been very kind to me. Anyway there is really no substitute for nut files. You can make a bass nut with hardware store needle files, but to file a slot for a high E on a guitar, there's really no substitute for a good job. No need to buy 6 files though, 4 is enough. Usually they are 0.013, 0016, 0.024 and 0.035.
KC