Rifle Scopes Burris XTR 2 zero stop problem

[TikkaCTR308]

I recently check zeroed my scope on my rifle, and as I was loosening the elevation drum, the entire drum came off. My rifle is still zeroed at the zero mark, however the zero stop (mechanical zero) is a further 50 clicks below that. I know the turrets are not supposed to completely off, but is there someway to reset my zero stop?

 

[TikkaCTR308]

Disregard guys, sorted. I loosened the screws then slowly spun the turret around maybe 360deg, so it was lined up with zero. Tightened the screws and it seems the mechanical zero stop is back were it should be.