happy with my spools on broomsticks and suspended under some shelves,
on from the shelf brackets.
it has it's impracticalities too, but taking up air instead of shelf real estate.
and recently a mesh-like pegboard where i hang clusters of knots off,
and offcuts...
also a bit of a cut-down juice bottle type containers system, stacked, and using clear plastic as possible,
and then corralled in cartons, clear if possible;
good to know how others sort their knottery