Hey Marlon, top job m8 - very impressive!
Just a side point on the stair design (well my 2 cents anyway), stairs typically run at about 34.5 degs. This is achieved with a standard Rise (vertical height) of 172mm per step (that’s equal to 2 standard house bricks) & a standard Run (horizontal length) of 250mm.
As a draftsman, I deign stair cases all the time & this is the basic formula I use. Apparently as humans we are so conditioned to these standard step heights that even a small increase can feel uncomfortable to climb.
Anyway, great effort m8 - looking forward to your next endeavor...
"If you think you can or if you think you can't....... you're right!"
- Henry Ford.