Achieving Pixel Perfect

[JDoubleU00]

I am curious how does one align addons that do not provide a precise means to nudge them? Some, you can edit the Lua files and change the coordinates, others have a nudge button. I am using the graph paper addon to help me line things up, but for some addons I can only drag them with my mouse. I just don't have the ability to move my mouse in small strokes.

Any suggestions are appreciated.