Challenging

Challenging
adjective
testing one's abilities; demanding.

Wow! This is my 600th blip.

Today should have been a satisfying day as I had found a solution to a long-standing issue with one of the buildings that I manage. Everything was arranged and the contractor had agreed to start at 7:30 am tomorrow morning so that work could be done before the building opened for the day.

Then somebody threw in a spanner! I think the spanner across the bottom of the picture has their name stamped on it (go large).