When tyring to soder a 3/4" x 1/16"th pice of brass flat stock to a brass tube for an A strut the soder barly sticks, I am using a 30 watt iron and soder that came with the soder iron, I was sucessfull about 1 yr ago with the small rails on a pt 109 gun turrents but I think this is because of the small pices I was using. My thoughts are use a more powerfull iron ?, better soder? and use steal wool and clean the area well. ?????? Can any one affirm this and or add to this, if so what watt iron type of soder, any help would be nice, thanks, Randy