pattern conversion: monster bunz to back snap wool romper

This post is the pattern conversion only.  The sewing tutorial is (here).

I love butt circle pants and I love wool.  Combining the two has been awesome.  Tonight however I was thinking I'd like a one piece old style romper that snaps shut at the back waist .  Trust me, they are awesome .  So I am combining the two.

I start with the purchased pattern.  The seams are in the wrong place for what we are doing thoug . We need side seams not centre seams.  So fold in half and tuck under pieces that form front of pants.

Lay on your new pattern paper (I use newspaper), with the waist on the fold.  Trace the pattern adding seam allowance to the outside of legs.  Also add a substantial hem allowance at waist. I fold my paper to get even on both sides when I cut. Then cut.

Now fold purchased pattern tucking back under.  Trace again with seam allowance at leg.  Leave lots of room at top of paper.

Grab one of baby's shirts.  Trace to make a pattern piece for shirt back.  Swing out side to match pant width.

Use that to make front shirt pattern piece (cut front neck lower though).  But make shorter shirt length then back and draft so the waists meet making one solid front piece.

Using shirt neck lines draft a front and back yoke.

Make a sleeve and cuff piece using your shirt and seam allowanc .

Use the butt circle and leg cuff pattern piece from your purchased pattern.

Pin pattern pieces to fabric. Make sure the stretch goes across the width of the pattern.  You will cut one piece of:
Pants back
Outfit front
Shirt back
Front & back yoke.

Cut two pieces of:
Sleeve
Sleeve cuff
Leg cuff
Butt circle.  (If made of jersey or fleece cut one, for wool cut 2 for water resistence.