I have a Leupold Vari X -3 3.5 -10 X 40mm scope.In 2012 I sent it to leupold to have it inspected and the knobs and reticle updated to a M5.,well I havent used this scope since 2012.So I took it out its box and mounted it on a M1A.I was looking at the elevation knob just to get familiar with it.I was looking for the zero numeral and there isnt one.It starts with 1 then 1.5,2 2.5 etc up to 6.In between the 1 and the 6 is a space but know zero marking.When I go to zero this scope should I start at 1 or halfway between the 1 and the 6.Any help would be appreciated.