landy lightweight

Hey - I have a lightweight that was originally fitted with an arctic heater - It now has a canvas top - would it have had a hard top? I have recently bought a heater, which sits in its place well but it is a bit of a mystery exactly where and how the screen vents fit and where the duct brackets fit - do I need any other special brackets etc. and can the sun visors still be fitted?

Hey, I'm having some problems with the electrics on a S111 lightweight - can anybody tell me what the function of the 'filter box' (mounted on top of the rocker cover) is and what it does. when I turn on the ignition the dash light is really dim, if I disconnect the supply to the box the dash light goes to normal brightness!! Essentially, nothing works properly - need help. I have replaced the 2 control boxes (behind the seats) and tried a different dynamo (90 amp)