Latest cable railing to be part of walnut stairs , there are cable twist between walnut steps and handrail.
We use 1/8” (3mm) cable first to test, but to be honest, it is a little bigger, we suggest that you can use 2mm cable to make the angle smaller. That will look better.
Here attached some stairs below, please check that.
This is stairs with walnut steps in top, riser and bottom also is covered by walnut .
Also customer like the LED,so we added it .
If you need more info, please contact NST Building team .