Those old-fashioned doorknobs have a lot more character than anything available today at the big box stores. I assume the doors themselves were made from planks and panels with proper joinery, too?

I've done the rear cassette on my bike, so I know the spline tool you're talking about. I should replace the front crank assembly on my bike soon as well. Any specific recommendations there?

As I am drawing house plans, I am deliberately avoiding sliding glass doors. Aside from one doubtless very expensive unit I have seen, they all are crap. I do not want to design a faulty, maintenance-intensive security vulnerability into any house.