The directions as they are will work fine for the 1.25 inch cuff using 4 mm beads and size 10 thread except that Row 3 will have 24 stitches not 28.
As with all bead crochet, the "wrong side" becomes the right side, the beads will form on the outside of the tube, there should be NO NEED to turn the cuff at the end.
Here are the corrections.
First - the thread shown is Lizbeth lavender size 20. The holes in chips are often smaller than beads so size 20works better than size 10.
Second you will need about 122 to 133 chips - smaller thread = more rows - I string about 150 chips myself.
The 1.5 blank is basically 2 stitches wider (front and back) than the 1.25 blank
Foundation row - ch 13,
Rnd 1: sc blo in 2nd chain from hook and each ch across to last ch, 3 sc in last ch, rotate work and sc in unused loop on next 10 stitches, 2 sc in last stitch, join with sl st to first stitch (26 st) place marker (pm) Move marker up at end of each round
Rnd 2: Ch1 sc in next 12 stitches, 2sc in 13th stitch, sc in remaining stitches, 2stitches in last stitch (28 st) slst in the chain 1 at beginning of row.
Rnd 3: Ch 3 (counts as dc throughout) dc in 1st stitch of previous row, dc in all stitches around, (be careful not to dc in base of ch 3, you will end up adding stitches you do not want) sl st in top of ch 3; ch 3 (28 st)
The thread should be a starting to form an oval cup, slip the tip of the brass blank into the cup to make sure that it fits the blank.
Rnd 4: Ch 3 Double Crochet in first stitch, dc in 2nd stitch,*dc with bead (dcwb) under both loops (the chips are heavy and need the support) in next dc. Dc in next dc (double crochet without bead). *; repeat from * 4 times. You will have 5 beads on the front of the work alternating with plain dc. Dc in next stitch, dc turning stitch, dc along the back 14 st to the beginning. Slst in top stitch of chain 3.
Rnd 5: Dc in first dc, * dcwb, dc in next stitch. * repeat from * 5 times (you will have 6 beads on this row – the rows alternate so the beads are staggered), continue to dc around to the beginning, join w slst to top of chain 3, chain3.
· The beads form alternating rows of 5 and 6 beads
· For bead stitches, snug the bead up next to the crochet hook before you yarn over (yo)
· Draw up only the beads you will need on your tension hand, you will have to slide the beads along the thread to access more thread for crochet
· Every few inches, slide the cover on to the blank. Crocheting in the round tends to make the design twist, putting it on the blank will help straighten it out and help you see if you missed any stitches.
· Whenever you put the project down, put a small safety pin through the working loop to prevent unraveling. It is a good idea to store the cover on the blank when you are not working with it.
· If the “twist” is too much for you, block the finished bracelet bead side down on a soft surface, like a towel.