After being let down by three so called 'local mobile caravan/mh repairers', (all who made appointments, promised to come on such a day, then never showed), I decided today to replace our very old and badly pitted roof light with a new one by Heki myself. Must admit the old sphincter was twitching a bit when I took the old one off, but hey, no probs! :thumb: Cleaned off the old mastic stuff, applied Sikoflex to the affected parts, and clunk click! What a difference! Natural light at last! And saved about £100.