Oh, this is bad....
Using 10.5 (US), my work is too tight, the back is about 1 1/2 inches too narrow, and I am getting too many rows in 4 ".
So I frogged that gorgeous piece of work, tried it again with 11s.
Too wide, too loose.
ARGH! and this needle company (Skacel/Addi) does not put out 10.75s