Sorry Petey.  I know I'm 8 months late but I do try to never leave unanswered questions about any of my projects and somehow this one slipped by me....

The answer is simply in the angle you do your blank glue up at.  Something around 25 degrees will give you a nice wide knot that's more what you would typically see.  But if you set your miter at 10 degrees instead, you get the same pattern but in a short, squat look.  At this point I couldn't tell you what angle I did my knot glue ups at but I'm gonna guess somewhere in the 10-15 degree range.