How best to secure these parts with thread?

i designed and 3d printed these frame parts, 6 of which are meant to fit together to form a cube. They fit together with 45 degree interior angles such that when the edges of two parts are tied tightly together it forms a perfect 90 degree angle.

I’m wondering if anyone here might have some suggestions as to what sorts of knots could be used to secure these.

So far i’ve found that looping one continuous thread in a spiral pattern through each hole and tying the ends together sort of works, but it’s tough to get it as tight as it needs to be.

thanks :)

i designed and 3d printed these frame parts, 6 of which are meant to fit together to form a cube. They fit together with 45 degree interior angles such that when the edges of two parts are tied tightly together it forms a perfect 90 degree angle.

I’m wondering if anyone here might have some suggestions as to what sorts of knots could be used to secure these.

So far i’ve found that looping one continuous thread in a spiral pattern through each hole and tying the ends together sort of works, but it’s tough to get it as tight as it needs to be.

thanks :)