Great tip - closing your eyes does make a big difference sometimes. I've found that is very helpful for training new fencers.

I am also a surveyor. That is what we call clapping a 90. Cheers

Same when you check the direction when felling a tree... Close your eyes to get a more accurate result

Steel erectors use the same technique when preparing a beam for a crane lift to get the center of the beam

Unbiased crow flap Nice.

This is one of the rare occasions when I actually use high school maths. Tape measure, spray can and Pythagoras..

I've been doing this for years when moving sprinkler pipe.

It did not work for me. I closed my eyes and spread my arms apart. When I put my arms together again and opened my eyes, my wife was still there !! (I'm still shaking my head).

Hi Tim, have been attempting to subscribe to your website but keep getting the following message “ Your IP has been flagged as spam/malicious.×” and doesn’t allow the subscription to proceed. Same message comes up when Submit Form is pressed under the Contact tab. Any clues how to sort?