Two symbols were missed off Chart A for our cover garment - there should be a sk2po in the centre of rows 11 and 13. In Chart D, the symbols in the columns for stitches 18,19 and 20 should be shifted over 1 stitch to to left.
A corrected chart containing A and D can be downloaded below. Sorry for any confusion!
The yarn quanties given were wrong, you should only need 3 (4:4:5:5) balls of Rialto Lace.
After you have worked the centre triangle for 184 rows, cast off the 187 sts using the Russian cast off.