OK I think I'm now sorted many thanks everyone
All following with Laco flux. Pics are all Hi-Res.
First tried turning Superfire2 (Mapp) right down to point it is tricky to relight (and hardly any bright blue flame). Took a long time to heat the joint, and ended up with blueing(?) under the joint, and poor solder finish again:
Photo by Roy_6666
. . . Torch also getting hot (not melting though
like the large turbine tip).
Also tried Propane/Butane mix on nice low setting, but again poor joint finish with non-leaded solder.
So switched to Lead and with the Superfire2 (small jet/tip) on a low setting, but some bright blue, and at a level that it will relight ok:
Photo by Roy_6666
Finally got a good result.
In following picture the Leaded one is at the bottom of the picture. Please ignore the right hand side joint on the fitting because I went back and dabbed on a bit more solder there out of interest (Compare all the left hand joints)
Photo by Roy_6666
So, many thanks I think I'm now "good to go" on my project next week, and got enough Lead left to do that, and a few more practice joints.
In future if I try non-leaded again at some point where would you recommend I buy from please. Similarly if I need more lead what would you recommend.
Many thanks,
Roy
P.S. I'd like to post my project separately, but any chance of being able to add the pictures properly in-line now. Is there someone I can ask for that now.