Originally Posted by v-verb
The knots drove me nuts! The mains weren't too bad but with the poly they were really difficult to get tight. And the crosses? Forget it - I ended up inventing a couple of knots because I was so pie-eyed at the end (after midnight) that I couldn't see straight - and I was trying to read a blurry pdf of the Klipper manual. Youtube videos weren't a great help either.
So yes you hit all the bad points - knots, directions, stiff poly. I had enough string but it was close and it's a 16 x 18 pattern! Not sure if I would have had enough for a 18 x 20. Have to measure really carefully nex time.
Did you buy a used klipper w/o the manual?