Oh yeh he castor wheels and the stool, well 4 weeks after replacing the castors and thoroughly checking for cracks in the alloy base it failed while I was on it. One arm of the base snapped and I toppled no major injury just lucky I missed the bandsaw on the way down.
I have now taken the spare stool into the workshop and back doing things again. The old stool has been scrapped for parts as the gas shock, castor wheels and some knobs were all fine.
Below are photos of the broken ally arm. The stool has been used by me for now some seven years so it has done well.
Warmer weather on the way spring s here so is the rain and winds.