Thanks for the comprehensive info. Barry. I did contact Peter Hambleton of Whitestake, only a few years ago, regarding the gas strut supports, just before he retired, and he mentioned that they do not give much bother generally. So I did not get round to replacing them. I took your advice and spoke to Will Takkou at Metrol and received the new struts (280 Newtons) by return carrier. It just took me 30 minutes to replace them. Yes, I have just pushed the bed up with one hand! What an amazing improvement! So thanks to you Barry and all the Exsis owners who assisted. I have had the Exsis SG since 2005 and have overcome most of all the niggles but this ranks as one of the best.
Cheers Bill