The weekend is here, Saturday duties done, - I have not been completely idle about it I have purchased a set of spare gaskets and 'o' rings from
http://lpg-kits.org.uk/shop/repair-k...-/prod_14.html
I have downloaded a number of pdf files showing the way to strip down the Necam components
http://www.elpege.cz/pdf/manual-koltec-repase.pdf
So having decided to investigate your solution I am embarassed to find that I have no tool with which to undo the 4 segment clips which appear to hold the air filter in place? Any useful suggestions will be welcomed!
Meanwhile my wife - for it is her car has started to make comments on the cost of running it on petrol.