Ditto that. I would rather have 1000 sq ft in a major metropolitan city (which I do) than 3000+ sq ft in the 'burbs. (Been there done that 3200 sq ft, but all the neighbors cared about were their lawns and sports center - yawn, never going back) Gotta have the pulse of the city.
As for the hobby, my family and 'city slicker' friends support me/it.
I have a similar plan for a Daytona project. However, the responses I received is the 21J movement is not too friendly to disable. You will need to remove the dial and hands, and possibly remove the transfer gears.
If I ever get my work bench set back up, I will respond back. (Although mine is a 21J with seconds @ 6, and I want to freeze everything except H,M,S@6.)
Perhaps some other experts can jump in...
Go for it. If you like modern with a hint of vintage, check out the 14060 No-Date Sub. No good replicas of it either, so a nice addition.
On my short list is a 14060 (non-COSC). Simple, clean, beautiful.
Hold it to your ear.
If you have a 28,8 listen to it (28xx). If you have a 21,6 (6497 PAM, Old 21J) listen to it. Personally, I find it easy to tell by listening.
"looking" at it, start the Chrono. If you have good eyes or a loupe, try and visualize and count the bph between each seconds hash. Slow beat your eye/count should see 6, High beat you should see 8.
The hard minerally water won't hurt your watch unless you leave it soaking in your toilet bowl.
It is still 316 Stainless. A little warm water and dish soap shouldn't hurt it.