Hi BJ,
Maybe a daft question but why silver solder?
It really does give super structural strength but needs a lot of heat which will temper or soften the (normally) brass wire used for masts etc. and can distort the whole thing.
I've not had a problem with the small blowlamps and silver, assuming the parts aren't large but you need to isolate the heat to the part being worked on, so don't use metal g-clamps to hold the job together or prop it up on metal V-blocks etc.
With larger parts, you may need to use a bigger blowlamp to heat the parts generally and use the little one for very localised heat.
Like Richard, I'd have thought that various heat ranges of soft solder would give ample strength with more control, whether you use a gas torch or a normal iron, without the problem that can arise with the silver.
Tony