more stable than whoopies????? might want to tell us what you mean by stable. I've got somewhere between 40 and 50 hangs using whoopies and I've always been stable-stable defined as not hitting the ground
Plus they are no knot. and with dutch clips and dutch biners allow a tot. no knot hang.
When you get to dealing with the tarp ridgeline you might have to tie one knot on on end to a s-biner but that's a one time deal...on the other side you can use a figure-9 and again find yourself knot free.