I don't I am afraid - but have just discovered that I have a C4-7 Boulter Pathfinder, and am looking to do a ROI to see if it is worth swapping it out for a more modern example. Do you happen to know what energy rating it is? I can not find much information about it... I do however have a chap coming around the week after next who may know the answer to your question, so will post back then.
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