RIP is a pain to unravel. And string is alittle soft and chewy.
Not my first choice to choose to string with but it's definitely not hard to string with.
Using the machine to tie knots demonstrates lack of experience from ur stringer. You should suggest watching Irvin's or Yulitle's youtube vid's. =)
I would find another stringer or just do it yourself.
Volkl V1 Pro