Here we go with the rocket instructions.

Inflate the red 350 leaving approx. 3 fingers uninflated at the top.
You will need to let some air out of the balloon as after twisting between a 3/4
hands for the main body section you then have to twist three pinch twists at the
bottom of the body so you need the balloon towards the knot end soft.

(You can inflate the 350 leaving 5 fingers in-inflated. Then measure down
from the top of the balloon 5 hands and then put the pinch twists in. Doing
this way the body of the rocket will not be so smooth as every time you add
a pinch twist there will be a curve/kink on the 350so I prefer version A)

Make three 2.5 finger bubble pinch twists at the bottom of the rocket.
The main body is between 3 and 4 hands in length.

Deflate the rest of the balloon but leave the excess to tie the body into the engine section.

Then make a small 1 finger spacer bubble followed by three more 4 finger fold twist.
The bottom section of the engine will look a little wider.

I then like to add another 1 finger spacer bubble back to the smaller fold twists.

The second twist goes into the underside of the grey 160.

Then make a 5 and 7 finger bubble and twist back into the 350 pinch twists.

Then make your last 7 and 5 finger bubble and secure to the lower engine section again.