Pattern is Vintage: David Grains Lopi 50
Reversed the directions from bottom-up to top-down.

Cast on 59 sts (1 extra). Put only 46 sts aside for sleeves and only 6 CO under arms. Started sleeve decreases immediately and decreased every 7th row 8 times; did not include rows 1-3 of lower chart in sleeve colourwork; at cuff, decreased to 24 sts for a tighter cuff.
In lower chart colourwork, replaced MC with black yarn to save on MC yarn.
I made the body shorter to compensate for amount of yarn available.
I bought a 28” zipper which now seems an inch too long. I had trouble crocheting along the front edge - the sweater angled in towards the neck. I bought a blocking kit and wires to block the front edge flat.

After blocking, the sweater stretched a bit and the zipper was a tad too short but I did fit it in eventually. The front edge was easier to crochet afterwards and I did not crochet into every stitch as that seemed to make the edge wavy.

On 6.5mm needles, 2m of yarn was enough for 49 sts; on 5.5mm needles, 2m of yarn was enough for 59 sts.