The next challenge was the welts.
I couldn't get a colour I wanted in the Cashmino, so rather than wait for a special order to come in (what, me, impatient? Never!), I used a 4-ply held doubled. I purled a few rows and then knit-joined them, just like the hem. Well, actually, I didn't really purl those rows. I did a wrap-and-turn and knitted those rows, with the inside facing the outside, so the purls would later be on the public side. Then another wrap-and-turn to go back the original way for the knit rows in between the welts, and after them as well.The welts didn't shape themselves quite how I wanted - they droop down a bit. Maybe I should have used fewer rows, or put a bit of foam stuffing in them. Oh well, they are what they are.
I started doing a spiral pattern decrease for the crown, but ripped that out as being too busy and fussy, and settled for a six-pointed star. I did this by doing a double decrease at the same spot every second row.I then knitted a rosette from the cream yarn, and stitched it on a brooch pin. It can be positioned anywhere, to hold a turned-up brim, or popped on the welt bands.
I needed to block the hat to make those double decreases lie a bit flatter. This was A Really Bad Mistake. The part of the hat that I wetted went as limp as a soggy noodle!
It also grew a bit. Very disappointing. The brim is still okay - possibly because I didn't wet it, and possibly because it is double-thickness.
I've since read on Ravelry that other people have not been happy with this yarn's performance. It would be great if you wanted something soft and drapey. Not so good for a "tailored hat". Sigh. It's still okay to wear.