Mischling Mitts

I am testing a pattern I have tweaked based on patterns here and here. Please note that this is a preliminary written-only pattern. Testing will begin henceforth.

Size US7 needles, worsted weight yarn, approximately 220 yards. This pattern is worked in the round. I knitted with magik loop.

CO 36

Cuff:
Rnd 1, 2 and 4: (P2, K4, P2, K1) 4 times
Rnd 3: (P2, CB4, P2, K1) 4 times
Repeat 5 times (or more for longer cuff)
Rnd 5-6: Knit
Rnd 7: Purl
Rnd 8: (K2tog, YO) repeat around
Rnd 9: Knit
Rnd 10: Purl
Rnd 11-18: Knit
Rnd 19: begin thumb gusset next round (see below)
Knit until 1/4" past your longest finger, then work decrease/shape top (see below)

Thumb gusset:
Right mitten: K17, PM, K1, PM, K
Left mitten: K15, PM, K1, PM
Increase by making one (however you like) every other round until you have 11 sts between markers. Knit one more round, then slip 11 sts on waste yarn, CO 1 and K to end.

Decrease/shape top:
Rnd 20: (K2tog, K4) repeat around
Rnd 21: (K2tog, K3) repeat around
Rnd 22: (K2tog, K2) repeat around
Rnd 23: (K2tog, K1) repeat around
Break yarn 3", thread through remaining 5 sts and pull tight, weaving in ends.

Finishing thumb:
Place 11 sts from waste yarn back on needle
Pick up 5 more sts around thumb hole
Knit until thumb is covered, begin decrease:
K2tog, K3
K2tog, K2
K2tog, K1
Break yarn 3", thread through remaining 4 sts, pull tight and weave in ends

Legend:
K = knit
P = purl
YO = yarn over
sts = stitches
K2tog = knit two stitches together
CB4 = cable back four. Slip 2 sts on cable needle and hold to back. K next two sts, then K two from cable needle.