Well bu**er me, but it only blimmin' works, doesn't it?! I can't believe I actually did it right. In fairness, Quattrojames' DIY guide was a huge help. However, now that I've tried it, I'm not sure I want it in there. Firstly, the light fitting (bought second hand on Ebay) is the wrong colour for the roof trim. Secondly, the holes I drilled are rather untidy. Thirdly, the beautiful ice white LEDs I put in the existing light fitting only last month don't fit the replacement. Here's a pic of my rather unlovely handiwork I'll take another look at it when it's dark, and then make up my mind. If I decide it's a keeper, I'll try to tidy up the holes. and then get onto Trups for some new white LEDs.