Measure twice

Senior moment:-[

Easily done. Now, I tend to draw on the mitre roughly in pencil. So you are reminded when you cut.

Think that got be going was fitting ornamental coving in a room with a pair of chimney breasts. Not only which way the mitre went, but which way up for the coving, and which side of the mark was the waste. Given the long lengths and using a circular saw bench with not enough clearance either end for a full length.

Apply a couple of bits of masking tape where you propose to cut before you offer it up.

I can't recall now why I...

I did that recently with a worktop. Not too expensive fortunately.

New alzheimers test ?.

It's at that point you think "phew, good job I've got just enough spare to cut another length from" and you cut the mitre in the other direction, then realise you should have cut it in the *other* other direction!

It happens when you're young as well! When I was in late teens, drilled a 5' 6" high 19" rack for mounting custom shelves/racks, abot 24 holes each side. Of course, the holes had to be a mirror image from the inside. Did them measured from the front, other side from the back. Corrected the wrong side, so getting another 24 holes, then corected the other wrong side that should have been done. At least it looked symmetrical enough to be a 'feature'.

BTDTGTTS!