Pre braze tube deflection
I noticed today while marking up a Zona tubeset ready for mitering that the downtube (650mm length) has a bit of a bend. When held down at one end, the other end is off the table by about 2mm.
Now I don't expect bicycle tubing to be perfectly straight - a tenth of a mm or two here or there is to be expected - but is a 2mm deflection enough to be considered faulty goods, and should I be looking to send it back to the supplier? Or is this perfectly normal, and I just continue with the build, being sure to position the tube so that the bend is set vertically, and cold set if necessary?