I’m not completely satisfied of increasing and decreasing method.

I studied pattern, projects and most helpful notes and I rewrote the pattern with favorite modifications.

CO 3 sts (long tail cast on)

Starting
Row 1 (RS): p1, ktbl, p1
Row 2 (WS): kfb, ptbl, kfb (5 sts)
Row 3: k1, p1, ktbl, p1, k1
Row 4: p1, k1, ptbl, k1, kfb (6 sts)
Row 5: k2, p1, ktbl, p1, k1
Row 6: p1, k1, ptbl, k2, kfb (7 sts)
Row 7: k3, p1, ktbl, p1, k1
Row 8: p1, k1, ptbl, k3, kfb (8 sts)
Row 9: k4, p1, ktbl, p1, k1
Row 10: p1, k1, ptbl, k4, kfb (9 sts)
Row 11: k5, p1, ktbl, p1, k1
Row 12: p1, k1, ptbl, k5, kfb (10 sts)
Row 13: k6, p1, ktbl, p1, k1
Row 14: p2, ptbl, p1, k2, pm, p1, pm, k2, kfb (11 sts)

Increase section repeated 6 times
Row 1: k4, slm, k to m, M1L, slm, k3, yo, ktbl, yo, k2
Row 2: p3, ptbl, p2, kfb, k1, slm pm, p to m, slm, k4
Row 3: k4, slm, k to m, slm, k2, p1, k2, yo, ktbl, yo, k3
Row 4: p4, ptbl, p3, kfb, k2, slm, p to m, slm, k4
Row 5: k4, slm, k to m, M1L, slm, k2, p2, k3, yo, ktbl, yo, k4
Row 6: p5, ptbl, p4, kfb, k3, slm, p to m, slm, k4
Row 7: k4, slm, k to m, M1L, slm, k2, p3, ssk, k5, k2tog, k1
Row 8: p8, kfb, ptbl, k3, slm, p to m, slm, k4
Row 9: k4, slm, k to m, M1L, slm, k2, p1, ktbl, p2, ssk, k3, k2tog, k1
Row 10: p6, kfb, k1, ptbl, k3, slm, p to m, slm, k4
Row 11: k4, slm, k to m, slm, k2, p1, ktbl, p3, ssk, k1, k2tog, k1
Row 12: p4, kfb, k2, ptbl, k3, slm, p to m, slm, k4
Row 13: k4, slm, k to m, M1L, slm, k2, p1, ktbl, p4, slk2p, k1
Row 14: p2tog, BO3 (tightly), p1, ptbl, p1, k2, slm, p to m, slm, k4

Straight section repeated 12 times
Row 1: k4, slm, k to m, slm, k3, yo, ktbl, yo, k2
Row 2: p3, ptbl, p2, kfb, k1, slm, p to m, slm, k4
Row 3: k4, slm, k to m, slm, k2, p1, k2, yo, ktbl, yo, k3
Row 4: p4, ptbl, p3, kfb, k2, slm, p to m, slm, k4
Row 5: k4, slm, k to m, slm, k2, p2, k3, yo, ktbl, yo, k4
Row 6: p5, ptbl, p4, kfb, k3, slm, p to m, slm, k4
Row 7: k4, slm, k to m, slm, k2, p3, ssk, k5, k2tog, k1
Row 8: p8, kfb, ptbl, k3, slm, p to m, slm, k4
Row 9: k4, slm, k to m, slm, k2, p1, ktbl, p2, ssk, k3, k2tog, k1
Row 10: p6, kfb, k1, ptbl, k3, slm, p to m, slm, k4
Row 11: k4, slm, k to m, slm, k2, p1, ktbl, p3, ssk, k1, k2tog, k1
Row 12: p4, kfb, k2, ptbl, k3, slm, p to m, slm, k4
Row 13: k4, slm, k to m, slm, k2, p1, ktb, p4, slk2p, k1
Row 14: p2tog, BO3 (tightly), p1, ptbl, p1, k2, slm, p to m, slm, k4

Decrease section repeated 6 times
Row 1: k4, slm, k to 2 sts before, k2tog, slm, k3, yo, ktbl, yo, k2
Row 2: p3, ptbl, p2, kfb, k1, slm, p to m, slm, k4
Row 3: k4, slm, k to m, slm, k2, p1, k2, yo, ktbl, yo, k3
Row 4: p4, ptbl, p3, kfb, k2, slm, p to m, slm, k4
Row 5: k4, slm, k to 2 sts before, k2tog, slm, k2, p2, k3, yo, ktbl, yo, k4
Row 6: p5, ptbl, p4, kfb, k3, slm, p to m, slm, k4
Row 7: k4, slm, k to 2 sts before, k2tog, slm, k2, p3, ssk, k5, k2tog, k1
Row 8: p8, kfb, ptbl, k3, slm, p to m, slm, k4
Row 9: k4, slm, k to 2 sts before, k2tog, slm, k2, p1, ktbl, p2, ssk, k3, k2tog, k1
Row 10: p6, kfb, k1, ptbl, k3, slm, p to m, slm, k4
Row 11: k4, slm, k to m, slm, k2, p1, ktbl, p3, ssk, k1, k2tog, k1
Row 12: p4, kfb, k2, ptbl, k3, slm, p to m, slm, k4
Row 13: k4, slm, k to 2 sts before, k2tog, slm, k2, p1, ktb, p4, slk2p, k1
Row 14: p2tog, BO3 (tightly), p1, ptbl, p1, k2, slm, p to m, slm, k4

Finishing
Row 1: k6, p1, k1, yo, ktbl, yo, k2 (13 sts)
Row 2: p3, ptbl, p2, k7
Row 3: k3, k2tog, k1, p1, k2, yo, ktbl, yo, k3 (14 sts)
Row 4: p4, ptbl, p3, k6
Row 5: k2, k2tog, k1, p1, k3, yo, ktbl, yo, k4 (15 sts)
Row 6: p5, ptbl, p4, k5
Row 7: k1, k2tog, k1, p1, ssk, k5, k2tog, k1 (12 sts)
Row 8: p8, k4
Row 9: k2tog, k1, p1, ssk, k3, k2tog, k1 (9 sts)
Row 10: p6, k3
Row 11: k2tog, p1, ssk, k1, k2tog, k1 (6 sts)
Row 12: p4, k2
Row 13: k2tog, slk2p, k1 (3 sts)
Break yarn, weave through stitches and pull closed

Given to Julie for Christmas 2012.