I knitted the border in the round and mitred the corners as described below. Delight and Alpaca together were not heavy nor hard on the hands when knitted in the round. Many thanks to Tomofholland for his advice on the border. I did a crochet bind off for a neater edge as it doesn’t stretch the stitches the way a knitted bind off does.

I am so very happy with how this blanket turned out. The Alpaca and Delight are so soft, warm and scrummy yummy. I wouldn’t call it instant but I would call it knitting gratification!

I did a provisional crochet cast on using waste yarn for each length. I held the live stitches at the top of each length on interchangeable wires and stitch holders.

M1 - Cable Block Set Up
I wrote this out because it is simpler to follow than the way the pattern presents it:
Knit 5 rows
Next Row = WS: K3, P3, K2, P4, K2, P3, K3, P3, K2, P4, K2, P3, K3.
Next Row: K3, (kfb) x 3, (K2, kfb) x 2, K2, (kfb) x 3, repeat again and K3. (53 stitches).
Continue M1 diagram, first row is WS, with 3 garter stitches each side and on first row after diagram:
Next Row: K3, (K2 tog) x 3, (K2, K2 tog) x 3,
(K2 tog) x 2, repeat and K3. (37 stitches)
Knit 3 rows.

M4 - Entire Wave Block
I found my written instructions easier to follow than this particular chart.
Knit 5 rows (row 5 = 1st row of chart)
Row 1 WS: K3, P5, K1, P9, K1, P9, K1, P5, K3
Row 2 RS: K7, P3, K7, P3, K7, P3, K7
Row 3 WS: K3, P3, K5, P5, K5, P5, K5, P3, K3
Row 4 RS: K5, P7, K3, P7, K3, P7, K5
Row 5 WS: K3, P1, K9, P1, K9, P1, K9, P1, K3
Row 6 RS: K3, P5, K1, P9, K1, P9, K1, P5, K3
Row 7 WS: K7, P3, K7, P3, K7, P3, K7
Row 8 RS: K3, P3, K5, P5, K5, P5, K5, P3, K3
Row 9 WS: K5, P7, K3, P7, K3, P7, K5
Row 10 RS: K3, P1, K9, P1, K9, P1, K9, P1, K3
Repeat the last 10 rows 4 more times.
Purl 1 row
Knit 4 rows

BLOCKING & SEAMS
Lightly Steam Blocked each length individually before seaming (with shot of steam jet from my iron held just above blanket). Blocked each square to 9 inches x 9-1/2 inches. Seamed strips together (see link below).

KNIT IN THE ROUND SETUP:
With right side facing, knit 1 row across held stitches at top of blanket using border colours then sew in ends of border colours. Now you’re ready to purl the first row/round.

You will need interchangeable needle extension pieces and a few wires. Once I joined to work in the round I used a 3mm needle for the left needle and a 6mm for the right needle so the stitches would slide better and not be stretched. It is the right hand needle that dictates gauge.

With the right side BOTTOM of blanket facing, 1st stitch of square:
Purl to 1 stitch before corner, kfb, pick up stitches up right side of blanket and purl them, kfb. (I used a 3mm circular to hold the picked up stitches and I picked up 2 squares of stitches at a time. Pick up from left to right) I purled them onto the right hand 6mm needle. This was easier than picking up 1 stitch at a time.
Purl across top of blanket stitches, kfb, pick up stitches down left hand side of blanket and purl them (as described above for right hand side). kfb into last stitch of side.
You have now created the corner stitches. Place a marker in the middle of the kfb’s.
Join to work in the round.

NOTE: When you do the knit round below for the first time, do a kfb into every 5th stitch on both long sides of the blanket.

Round 2: Knit to one stitch before 1st marker, kfb, slip marker, slip 1 knitwise, kfb, knit to 1 stitch before 2nd marker, kfb, SM, S1, kfb, knit to 1 stitch before 3rd marker, kfb, SM, S1, kfb, knit to 1 stitch before 4th marker, kfb, SM, S1, kfb
Round 3: Purl to marker, SM, K1, purl to marker, SM, K1, and repeat to end of round.
Repeat rounds 2 and 3 until you have the desired number of border rounds.
I knit a total of 16 rounds which included the pick up stitches and bind off rounds. This gave 10 garter ridges at the top and bottom of the blanket when counting the 2 ridges at the top and bottom of the lengths.
I cast off with a crochet bind off and 6mm hook.

In case you were wondering:
When you get to the fourth corner, kfb, SM, kfb, the next stitch will be the first stitch of the new round i.e. purl. On purl rounds when you get to the fourth corner and knit the last stitch, the next stitch will be the first stitch for the knit round.
In other words, the beginning of the round changes every round to be the first stitch after the fourth corner’s stitch.

Helpful Links:

Crochet provisional cast on:
http://www.youtube.com/watch?v=UeExgbgTOgs

Garter stitch seams:
https://www.youtube.com/watch?v=9cFfNVDY7oM

Crochet bind off:
https://www.youtube.com/watch?v=efRaicXpT_8

Invisible join to cast off edge:
https://www.youtube.com/watch?v=2P-J-buBbiQ

I hope you found these notes helpful:)