So I picked one of these up yesterday in Glasgow off gumtree , its less than a year old and had hardly any use so I'm happy with gettin it second hand and at a decent price but it ddidn't come with any instructions ect so I don't know what the settings mean , it has ether 9 or 18 settings I'm not sure , 1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I , I think it is. It's sitting on 8 atm , anyone any idea what the settings mean ? Cheers