Zec 4:10 For who hath despised the day of small things? for they shall rejoice, and shall see the plummet in the hand of Zerubbabel with those seven; they are the eyes of YHVH, which run to and fro through the whole earth.

A "plummet" or "plumbline" in Scripture is the same device as a "plumb-bob" of today, functionally speaking.

16 ounce Swanson Brass plumb-bob hanging from 14.5 foot 8 lb. twisted #15 mason line.

Update: June 5, 2014:
I have checked the plumb-bob again, and it was left of the line.
I have yet to learn. I'm not sure how to do the test, or need more equipment to do it scientifically, and a longer plumbline.

These two photo's taken with camera facing "South".  
Notice conjunction day (of the moon-SME event) plumb-bob is "east" of line. SunMoonEarth gravity. Notice day after conjunction plumb-bob is right back on the line.
May 28, 2014, 8:46 a.m.     East<----->West (day of conjunction) May 29, 2014, 10:36 a.m.     East<----->West (next day after conjunction)


Day of Conjunction-June 27, 2014- photos of plumb-bob: