You need to change to CC4 (black) on the main Flamingo piece 8 rounds before the end. This is before the instruction Next 7 Rnds.

Free Spirit Waistcoat

Some readers have struggled with placement of stitches and making up, so we've tried to clarify this below.  

Rnd 3: Sl st into blo of first 2 chs of first 3ch-sp, 1 ch, [1 dc, 5 ch] into next 3ch-sp 12 times. Join with sl st. 12 sts

Rnd 4 (WS): Sl st into BLO of first 2 chs of first 5ch-sp, 2 ch (does not count as st) [Bobble st, 5 ch] into each 5ch-sp around. Join with sl st.  

Rnd 5 (RS): Sl st into BLO of first 2 chs of first 5ch-sp, 1 ch, [1 dc, 10 ch] into next 5ch-sp 12 times. Join with sl st.  

Rnd 6: Sl st into first 10ch-sp, 1 ch. {[1 dc, 4 htr, 1 ch, 4 htr, 1 dc] into each 10ch-sp} 12 times. Join with sl st. 120 sts

Rnd 7: Sl st into next 5 sts, 2 ch, {[PS, 10 ch] into next 1ch-sp} 12 times. Join with sl st. 12 sts

Rnd 8: Sl st into 10 ch-sp, 1 ch, {[1 dc, 5 htr, 2 ch, 5 htr, 1 dc] into next 10ch-sp} 12 times. Join with sl st. 144 sts

Rnd 9: [10 ch, 1 ttr], 8 ch, miss 6 sts, 1 dc, *[8 ch, miss 6 sts, 1 dc] 4 times, 8 ch, miss 6 sts, [1 ttr, 5 ch, 1 ttr] in next st, 8 ch, miss 6 sts, 1 dc; rep from * 3 times. [8 ch, miss 6 sts, dc] 4 times. 8 ch, miss 6 sts. Join with sl st into 3rd ch of beg ch-10. 28 sts

Rnd 10: Sl st in BLO of first 2 chs of first 5ch-sp, [9 ch, 1 tr] into 5ch-sp, *{[6 ch, htr] into next 8ch-sp} twice, {[6 ch, 1 dc] into next 8ch-sp} twice, {[6 ch, 1 htr] into next 8ch-sp} twice, 6 ch, [tr, 6 ch, tr] into corner 5ch-sp; rep from * twice, {[6 ch, htr] into 8ch-sp} twice, {[6 ch, dc] into 8ch-sp} twice, {[6 ch, htr] into 8ch-sp} twice, 6 ch, join with sl st into 3rd ch of beg 9 ch. 32 sts

Sizes L/XL only:  

Rnd 10a: Sl st 3 times into 6ch-sp, [9 ch, tr] into 6ch-sp,, *[6 ch, dc] 7 times,6 ch, [tr, 6 ch, tr] in corner; rep from * 3 times, [6 ch, dc] into 6ch-sp 6 times, 6 ch, Join with sl st into 3rd ch. 36 sts

Rnd 10b: Sl st 3 times into 6ch-sp, [9 ch, tr] into 6ch-sp, *[6 ch, dc] 8 times, 6 ch, [tr, 6 ch, tr] in corner; rep from * 3 times, [6 ch, dc] into 6ch-sp 7 times, 6 ch, Join with sl st into 3rd ch. 40 sts

Rnd 10c: Sl st 3 times into 6ch-sp, [9 ch, tr] into 6ch-sp, *[6 ch, dc] 9 times, 6 ch, [1 tr, 6 ch, 1 tr] in corner *; rep from * 3 times, [6 ch, 1 dc] into 6ch-sp 8 times, 6 ch, Join with sl st into 3rd ch. 44 sts Rnd 10d: Sl st 3 times into 6ch-sp. [9 ch, tr] into 6ch-sp, *[6 ch, 1 dc] 10 times, 6 ch, [1 tr, 6 ch, 1 tr] in corner *; Rep from * 3 times, [6 ch, 1 dc] into 6ch-sp 9 times, 6 ch,?

Join with sl st into 3rd ch. 48 sts

Row 61: sl st into each st and 1ch-sp to end to bring working yarn back corresponding side needed to create armhole.

Now, to create the armhole, join with sl st to bottom RHS R10 6ch-sp.

Fasten off and break yarn.

Row 62 (WS): With WS facing, rejoin yarn into 1st R61 st

Edging:  

As you are edging the work, you will mostly be working horizontally into the ch-sp's created by your previous stitches.