thanks for the fave and watch, i really appreciate it (as you've noted, i don't get a whole lot of attention - my other work's not that remarkable, and the celtic knot constituency is pretty small).
the first step - creating the path of the line - can be done in a million different ways. there are two in particular that i've tried, and one which has become my favorite. i've never really used a grid, or at least not graph paper. the method i don't use much anymore is to draw the spaces in between the lines instead of the lines themselves - for example, when two parallel lines intersect two parallel lines, there is a rectangular space in the middle.
what i do now, particularly for the ring knots like the one you mention above, is kind of hard to explain; i draw a circle, and then i treat the circle as if it were an infinitely elastic piece of string - i pull in and twist and bend sections of the line, and perform equal/opposite manipulations on the other side of the circle to keep the whole thing symmetrical. the important thing to remember while doing this is that the line always needs to connect back to where it started - if you keep this rule, you end up with a single-lined knot.
like i said, it's complicated. if #theknotters gets me a few more pageviews, i might do some kind of tutorial - for now my site doesn't get enough play to warrant it.
thanks again, and compliments on your stuff as well. it looks like you've got the basics of continuity and patterning down pat - i'm interested to see where you go from here.

no problem. s'retty funny stuff.

YAH!