27g should be fine. But I DL on all my KF's. I don't have to slipstream air around the dt on the v5 with the air set on 3 or 4. But if I want to tootle I close air down to 1 or 2. 28g is all I use.
I will see how KF performs but for DL I prefere more airy attys. For DL I'm using Avocado 24, Gemini and Cleito120 is on the way. I will try to use KF for MTL mainly, but who knows.
I love DL, but it is too intense for me in most situations, so I'm primary MTL man... though after three beers I'm switching on DL regularly.
Has anyone made a clone of mtl kit for KF V5? It looks very simple, I expected it to appear on FT until know.