I have made a few quilts. I hope you dont mind if I comment........
Well, i have never used the birthed method on a quilt like that, only on miniquilts, i like the binding method better.
This is what I do........1st.
i just layer like a sandwich the top, inside wadding the thickness and type you like, and a bottom like sheeting material.2nd.
Buy a big bag of quilting pins (like big safety pins) and evenly space the pins to hold the layers together. (this replaces the need to baste like old days, quick method). 3rd.
Than quilt the straight lines with a walking foot from the centre outwards that stops any shifts of fabric as much, ie no puckers which happen if top moves. When you have quilted what you want as little or as much as you like do.4th.
Finish by binding the edge to finish the raw outside perimeter edges. Using this quick binding the method as follows easily and quickly covers the raw edges.
Making the binding.............its simple buy enough fabric in one length ie a cotton to match to easily go up one side, than cut your strips parallel with the selvages as this will mean less stretch and thats good cos you dont want the edges to go stretchy over the years.
Cut these strips like about 3 1/2 inches wide (wider if you prefer ), obviously you need 4 strips as you have 4 sides.
Than you need to join them together to make one long binding, than fold it length wise and press with iron nice and flat.
NEXT TIP OPTIONAL: using crochet cotton (thicker one) zig zag a row around edge of quilt, this firms the edging and helps prevent warping and mishappen edges in the years to come when the quilt is washed.
So than you place the place the binding double raw edges to the edge of the quilt and sew a 1/4 inch seam to join it all around the edges (makesure the cotton you zig zagged is hidden where the binding covers it.
So when you get to the corners you will need to mitre it. Sounds hard but that is easy enough, i will see if i can take some pics tomorrow of these steps to show you the technique on a mini quilt, as i am working today. I know a nifty fast way.
Anyway when all is sewn you flip it over so that nice fold goes over the raw edges to the back, covers the seam visible, than hand sew tof inish.
If you dont like to handsew than do this... sew binding on the backside of the quilt, along edges the same as above, than you flip and sew with the binding with the sewing machine from front, looks neat enough but you will see a sewing line on the underside.
I will try and take some pics of what i mean and add to this post.
or maybe there are some on that quilting site.
It might sound hard but its actually not that bad. maybe try it on a practice piece first.
This isnt the only way to quilt, you can quilt each square or strip of squares seperate than join another way with more strips that form like sashing. That works well too. I dont use this method but many do.
ok hope this helps someone.