TV-static Jacket

It is the first time I try to write down a pattern. If you have suggestions on how to improve this, please let me know :-)

This jacket is made using super bulky wool, Rosendahl by Gjestal, 7 skeins.

Needles: size 5 and 7.

Gauge: 17 stitches x 22 rows = 10 x 10 cm.

Cast on 128 stitches on needle size 5.

Purl 2, knit 2 back and forth until it measures 10 cm.

Then switch to needle size 7 and knit one way and purl on return.
Work until desired lenght is reached when measuring from under the arm.
Place a marker 32 stitches counting from the beginning of the round and one marker 32 stitches from the end of the round. Then knit until 2 stitches from the first marker, and bind off 3 stitches. Continue to knit until 1 stitch before the next marker, and bind off 3 stitches, and knit to the end of the round.

Then you knit the arms:
Using needles size 5, cast on 52 stitches.
Knit 2 and purl 2 around and around.
Increase 2 at the beginning and end of every fifth round.
When the arm measures 15 cm, insert the arm in the first "bind off section". Then make the next arm and to the same into the other section.

The arms and the rest of the jacket are knit together using raglan:
Place a marker on each "junction" between the arm and the jacket, a total of 4 markers.
On each knit side: 3 stitches before each marker - knit 2 together, knit 1, then on the other side of the marker, knit 1 knit 2 together,
On each purl side you do not decrease, just purl the entire round.
Continue this until you have 70 stitches left, then bind off.

The collar:
The collar can either be knit separately and then sewn on, or you can knit it on.
Cast on 30 stitches,
Purl 3, knit 2, purl 6, knit 2, purl 16, then knit the last stitch on the needle together with the first stitch on the jacket edge.
Knit 17, purl 2, knit 6, purl 2, knit 3. Make sure the knit stitches of the collar are on the same side as the purled stitches on the jacket. If you wish to add the cable, then every tenth round on the knit side, slip 3 stitches onto a third needle and place these behind the main needles, knit the next 3 stitches. Then knit the 3 slipped stitches, and continue the patten.