Just wanted to share...I cut up some fleece liners yesterday from a blanket and I decided to make them triangular with the top/bottom point cut off (a trapezoid) because the rectangular ones weren't covering the back of the cover and the PUL was sticking to her bum.
It worked GREAT!
I made them about as wide as the back of the diaper and tapered to slightly narrower than an insert in front. It didn't waste much fabric because I alternated cutting one up and one down. It seems to contain the poo much better.
I'm sure someone already had this inspiration but I thought I would share.