Thanks, for you prompt reply Grainger, this is a great forum. Yes, I think your info will be very helpful. I think I understand it! Oh one other thing, when rechecking all the solder joints I discovered a wire that needed trimming, but was inaccessible due to an overhanging capacitor, so I bent the cap upwards to gain access to the wire and upon doing this I accidentally snapped one of the leads to the cap. I resoldered it back onto the lug, and it seems to have a good connection back into the lug now, definitely stuck in there, but I suppose I cannot be sure. any thoughts?? thanks