Hi Jens,

Here is your stairfile for this stair 

regards

Michel 

Hi Jens

30mm is too much as a general rule to apply is 1/3 of the thickness. 45 for your stringers means 15 penetration for the steps. the same is then applied to the newels

Have you checked the shoulderings for your tenons  I advised you to set them to 15mm instead of 18 and add a riser to the last step

Please reply on suggestions I make to avoid repetitively communication 

regards

Michel 

Hi Jens

I looked at it and can advise the following 

Shoulderings of tenons to 15mm for stringers and handrails. Better tenon and the same depth as the stop notches.

A riser on the last step to hide the floor joist and strengthen the last step.

Why is there no newel on the start of the stair connected to the handrail?

regards

Michel