YYJ Legacy 3

So a possible problem is string choice. I have some kitty string, slick 6 and YYE intermediate. Is it possible I have a thick string problem? I can trapeze or split bottom or double or nothing but lose spin almost immediately, almost immediately. One brain twist and no more spin. My thinnest string almost completely fills the gap. Loop 360, Hornet and the YYF One (borrowed the One for a day) don’t seem to fill the gap as much.