Kokopelli ,
You dont need to invent the wheel again , best rangefinder is Leica and Leica Mini Zoom Elmar 35-70 is 60 dollars at keh.com. I dont believe any other japanese camera can compete with it. Use 400 ASA film at winter and you will be the happiest person , these cameras were 500 dollars at 96 and it deserves every cent of your 60 dollars. Its autofocus , autowind , viewfinder change with the zoom.
In 15 minutes , I will PM two examples from Gallery and you will believe with your eyes.
Check your PM , PM is at the right top corner and appears a warning saying you have a message.
You must refresh your APUG page every five minutes so you will not miss it. I will report here , I sent it.
Umut