For any of you who use this clipper....I just received this clipper that I ordered to attempt to do my dogs face and feet etc (I had purchased the Andis AG2 but was reading this would be better for the more delicate areas) and the instructions for us total grooming newbies are lacking lol. I know the blade does five lengths 9,10, 15, 30 and 40 but it doesn't say which is which. On the blade toggle it has positions 1, 2, 3 and 4. I am assuming that position 4 is the longest length of hair left ie the 9? I just want to be sure before I make my first run and end up way too close. I think doing it the longest would be best in the beginning for me so I don't give them clipper burn or anything. and it did not indicate like the Andis did that I should oil blade before first u se but is this preferred? Thank you so much!