Woth noting that we've been informed independently by the different suppliers 
of both our wave solder and our selective solder that mixing alcohol based 
fluxes and water based fluxes in the same machine as you suggest, swapping 
between 2 bottles, is not a good idea. The flux delivery pipework joints suffer 
eeach time you changeover and eventually leaks occur. Unless its unavoidable 
its best to decide which type works best for you or the customer and stick 
with that!

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