Cardboard or Tabletop
Flatten out tee and pin to cardboard
Pin Measuring tape length of tee down the middle.
Draw line down middle, I made mine 12" long though my goal is actually only about 6" or 7".
Start at 1/2" to 1" intervals depending on how often you check.
Tada! And only took me about 15 mins :) Including taking the time to take pics and a video.
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