Handles/Door Stop

Cut the PVC into three lengths using a hacksaw. These should be cut to just slightly longer than the width of your closed hand. For me it was about 4.5". Two will be handles, and one will be the door stop. Use a utility knife to fillet out the inside edges of the ends of each piece; this will prevent rubbing and abrasion of the straps on those corners. Wrap the handles in a layer of Gorilla Tape. I find that Gorilla Tape works best, as it's extremely durable and offers a nice grip on the handles. Wrap a couple layers of foam tape on the door anchor, then wrap a layer of Gorilla Tape over top of that. This combination adds a good about of protection for the door and creates a friction "bite" on the door that will prevent any slipping while moving around and exercising.

Straps

Measure out and cut your 10', 4', and 1' lengths of strap. Cut off any tags or hooks attached to the straps when you got them, you just want strap material. When you make a cut, burn the edge of the strap immediately to prevent fraying; just take a flame to the end and just make sure you see a line of melted nylon form across the edge.

Thread two handles and two pieces of heat shrink through the 10' strap, slide a piece of heat shrink on the 4' strap, and slide the "anchor" end of the cam buckle and the door stop through the 1' piece.

Sew

Create a Lower Triangle on one end of the 10' strap by setting a handle approximately six inches from the end of the strap, then bringing the strap end to the rest of the strap about six inches above the other end of the handle (see picture) Secure the strap end to the other side of the strap with a Box X stitch. Create a Lower triangle on the other end of the 10' strap in the same way

Create a small loop (about 3 inches in diameter) on one end of the 4' strap. Secure this loop with another Box X stitch. The other end of this strap will feed through the cam buckle (see picture)

On the 1' strap with the cam buckle and door stop, simply sew the ends of the strap together with another Box X stitch to close the loop. When complete, slide the stitched joint into the body of the door stop to hide it.

Shrink

Slide a piece of heat shrink over the stitches on the Lower Triangles and small loop. Shrink it down by applying even heat with a heat gun or lighter/torch from a distance. Be careful not to burn yourself or damage the straps or stitches.

You should now have three separate pieces: