Best Nozzle for Close Angle Merged Exhaust Tubing?

[Kempy]

When I have to get into very small places I us standard collects and holders with long cups preheat if possible and set gas flow differently for the small ends just test it on a part to see how it work before doing the big job. Use type B solar flux in side the pipe if stainless steel then you don't have to use argon in the pipe. The flux provents burn throught, ozide inclusions and aids controlled penetration also elimiates porosity. GOOD LUCK