This is really funny, for the stability of the stair I want a leg at the corner of the inner string and now I'm practising with a toy I haven't used since I was 15 years old (30 years ago), The lathe....
It is really terrifying at the beginning but after a while I'm quite comfortable with the accessories :-)
Before I start cutting in the quite expensive material for the steps I have now made wooden templates and I'm astonished how well the fit without any further compensation of the first cuts. So next weekend I have to gain some courage and start with the steps.
The left string has been adjusted from the original drawings so it can get support from the wall behind and if I may say so, it looks quite nice.