I have a few questions, I bet you do too

I recently started making my own string but do not really know how to control the certain factors like how to hold tension and stuff.

Another question i have is if there are special threads to use because i use coats and clark dual duty but i want another thread to vary things like softness.

Thanks Felipe

I also forgot does any one know how to make a rig for string making?

how to make a string rig: