Hi folks, just got me a 300tdi Defender. Wondered what the sensible moves would be to improve performance, economy etc? From what I've picked up here I should be thinking about removing the EGR valve (parts on order) and de-gunking the manifold, de-catting it (that'll be the next job), but what else would people recommend? Any benefit in forking out for a K&N or Pipercross filter?