For the first time in years I have attempted to scratchbuild a tender chassis out of 0.4mm n/s strip. Something that is causing me grief is getting a bridge of solder to join two pieces of strip held at right angles to each other. In spite of lots of flux the solder seems to adhere to each side with surface tension stopping the solder bridging the joint. I am using Templer's Telux Soldering Flux and use a non-resin solder with a 60/40 Tin/Lead alloy. My soldering iron is an Antex 50W with a straight chisel tip around 5mm across. Can anyone recommend a solder/flux/tip shape combination that would allow me to achieve the quality of soldered joint seen on this forum? Thanks.