I've been messing around with a slim and futur each day seeing if i can get away with dialing it up one more. Today I finished after starting my first pass on 6 then 5 for second and 4 for the third. I started this way with 3 for my first pass then 2 then 1 (until now i start at 6). I definitely got a closer shave and no more irritation then i did on milder settings. Im just wondering what problems people run into if they feel they dialed up too much because i didnt seem to have any. Why wouldnt you want to shave with your razor at the most aggreive setting as that would provide the closest shave?? I used a feather blade and TOBS avocado cream.