i am reading up being new to strait razors before i attempt to purchase one.it seems a 5/8 would be good for a beginner but i notice a lot of 6/8 razors out there.is there in practical shaving trying to learn that 6/8 would be less helpful to me.it is only1/8 difference but i understand how helpful it might be to have that 5/8 under the nose.thanks john