Hello David N and List I have never had any failures with loosening a setoff or letoff screw when using a small wattage soldering iron - such as used in the electronic scenario. In uprights I sometimes take out the rail and do the whole lot in one session. Sometimes there are several short rails - but the same approach applies. Apply the tip of the small soldering iron to the ring of the screw - hold it there for some time - go on to the next screw and while that is heating up your spare hand is twizzling the heated screw with a setoff tool. I'm afraid I'm rather old fashioned in-as-much as I only have the tool which completely covers the ring. This is no bad thing, actually, because that tool gets pretty hot and aids the loosening process - and it doesn't slip off the ring. Regards from an Ashes winning England. Huzzah! (cricket) Michael
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