Waterbase, waterbase=no flash
=irrelevent if you need a bright color on, say, an AA tri-indigo
Same tack as everything else for tris here - TexTac, rolled on. Whitewater's tip is excellent, keep the fabric down and don't let it get any closer to the flash. Load collars off wherever possible. In extremis, use a more narrow platen for any sizes that would put seams on the platen.
Ditto on mesh/ink/screen no big changes there from other fabrics although stroke pressure/angle/speed gets messed with.
Flash at lower power, longer v. high and fast. Beware the change between one color of tri and another, some will light up real bad, others can take a normal amount of heat. That's probably our main hassle with them- singeing a collar when the shirt colors in the run change.