Just spent a pleasant afternoon carrying out a Cat 4 repair on my 20 year old Weber kettle (Nellis BX - where else?) having found it with a heavy dose of corrosion and seized air paddles. Repairs carried out 'satis' and Weber reluctantly donated to No2 Son as he helped me out a few months ago..... sad to see it go ....... but a good excuse to visit him so he can do the cooking