Trouble With Grid

I was modeling a piano today and I found it difficult to keep duplicated objects attached to the grid. Any pointers?

Just hold down the Ctrl key when moving the duplicates . Or you can just turn auto snapping on by pulling down the User Preferences/ top header (LMB when the cursor changes to the up/down arrow and drag down) then Views & Controls -> Snap to Grid: -> Grab/Move (you can also turn it on for scaling and rotating also) .

I do use Ctrl :stuck_out_tongue: they somehow find a way to attach themselves to a grid that doesn’t exist… Although recently i’m not having the problem