Anyhow, I decided that a firm gauge for a blanket was essential. This is my swatch on 3mm :
Still thought the gauge was too loose, and tried it on 2,5 mm. I had to go out to buy new needles, the only 2,5mm I had were bent, and very old. I don't usually knit on 2,5mm ! (except socks, but I have small dpns for that purpose). So this is my first square, knitted on 2,5mm :
I'll show a bit more of my progress tomorrow.