I have that gun with a 1.2 and spray UV clear. Don't like it at all, can't seem to get a smooth finish with it. For such a small gun, it's a hoser though. I much prefer the sri pro lite with a 1.2, which is what I mainly use now.
Miniguns are a whole different game when it comes to tip sizes. I guess is the relationship of the needle and the size of the aircap.
My Iwata LPH-80 1.2 will spray the Universal fine, but I would only use it for small parts.
The LPH-300 is an in between gun in size, not mini but smaller than the LPH-400 and with a smaller fan, it could very well be the perfect gun for bumpers and 1 panel painting. Mine sprays pretty much everything good (epoxy, 2K sealer, basecoat, clear, SS) with a 1.4 tip.