DISCLAIMER: These are just draft notes for myself, as I intend to knit this pattern several times.
This is NOT a detailed pattern, you may use it if you are familiar with knitting abbreviations and top-down constructions, but be aware that I will not provide an “after sales” service as I unfortunately do not have enough time to answer questions and solve problems that you may encounter… Thank you for your understanding :).

Body:
CO 47st (use 100cm yarn tail)
R1: sl1 pw k1/p1
R2: sl1 pw p
R3: BH = sl1 pw, k1, p1, k1, YO, k2t, p1 - k1/p1
R4: sl1 pw p
R5: sl1 pw k1/p1X3 – k1, KFB – PM, KFB, k3, KFB – PM, KFB, k13, KFB – PM, KFB, k3, KFB – PM, KF, k5 - p1/k1/p1/k1/p1/k1/p1
R6: sl1 pw p
R7, 9, 11, 13, 14, 15 = R5 (KFB before and after marker)
R8, 10, 12, 14, 16 = R6
R17: BH = sl1 pw, k1, p1, k1, YO, k2t, p1 - KFB before and after marker - p1/k1/p1/k1/p1/k1/p1
R19, 21, 23, 25 = R5 (KFB before and after marker)
R18, 20, 22, 24, 26 = R6
R27: divide for arms = place arm stitches on scrap yarn (27 st)
R28, 30 = R6
R29: k1/p1/k1/p1/k1/p1 – k all stitches - k1/p1/k1/p1/k1/k1
R31: BH = k1/p1/k1/p1/YO/P2T – k all stitches - p1/k1/p1/k1/p1/k1/p1
R32, 34, 36, 38, 40, 42, 44 = R6
R33, 35, 37, 39, 41, 43 = R29
R45: BH = k1/p1/k1/p1/YO/P2T - k all stitches - p1/k1/p1/k1/p1/k1/p1
R46, 48, 50, 52, 54, 56, 58 = R6
R47, 49, 51, 53, 55, 57 = R29
R59: BH = k1/p1/k1/p1/YO/P2T - k all stitches - p1/k1/p1/k1/p1/k1/p1
R60, 62 = R6
R61 = R29
After R62: transfer stitches on 5mm circular needles, keeping last 6 stitches on straight needle
R63: join in the round, knitting together first 6 stitches (see photos)
R64: knit in the round

Divide for legs (39 st for each leg):
R1: PU 2 st, k all stitches, PU 2 st
R2 to 32: k all stitches
R10, 20, 25, 30: decreases = k1, ssk, k all stitches, k2t, k1
R33, 34, 35, 36: k1/p1
R37: BO with 6mm needles
Pick up st for sleeves:
R1: PU 2 st, k all stitches, PU 2 st
R2 to 32: k all stitches
R10, 20, 25, 30: decreases = k1, ssk, k all stitches, k2t, k1
R33, 34, 35, 36: k1/p1
R37: BO with 6mm needles

Alternative border (7 stitches):
odd rows: sl1 pw k/p
even rows: sl1 pw p
Buttonhole: sl1 pw, k, p, k, yo, k2t, p