Brownell's does have a solder that melts at a very low temp, (from the jewelry trade if I recall correctly).
I have a similar job to do and inquired about its suitability; Brownells' tech replied with a recommendation against the super-low melting solder (even though they sell it). I thanked them and replied that I intended to buy some eutectic solder (formulated to melt at lowest possible temp for a lead-tin alloy), which Radio Shack sells.
I will probably use (Brownells) heat-stop an inch or so away from the loop on each side, held back, away from the loop area inside each bbl by a rag or cork -- just in case there is a "surprise."
