1. My cast wheels make it nigh on impossible to get the air-line onto\nthe valves. Is there a solution? What is that stuff you put in tyres to\nprevent punctures and is it to be recommended??\n\n2. I have an old Ford radio/cassette installed, cassette is fucked, is\nit a simple matter to wire up a radio? I am getting a second-hand\nreplacement and don't expect there to be a manual with it.