Sourdough English Muffins

I've not made English muffins for years and years. I chose the King Arthurs's recipe here:

http://www.kingarthurflour.com/recipes/sourdough-english-muffins-recipe

They are very good, not quite the crumb texture I was looking for, I wanted it a little more open, so I will try adjusting my fermentation and proofing times. I really don't want to change any of the ingredients because they are so good, especially with Candy Apple home made jelly!

Which by the way can be found here:

http://www.tasteofhome.com/recipes/candy-apple-jelly