Air chambers

is it worth replacing them (does air suspension work)? From my experience no they don't really add much - you're better off performing a taper-roller steering head bearing conversion - this improves the handling much more. For details pester JFerg, as he made up a detailed recipe a few years ago.
When deleting the rubber air-bags, you will need to keep the rim, as it acts as a spacer. But the stock dampers aren't that good - you'd be better off spending a bit of money and replacing them with BiTubo dampers. ,,,