The mechanical design of Neo900 is affected by numerous parameters that originate from N900, and that we have to determine by measuring case and other parts. So far, we did many of these measurements in an ad hoc fashion. This sometimes created the problem that, when coming back to some part of the design after a few months, it wasn't quite clear where certain parameters came from, and we often had to repeat measurements to confirm these parameters.

Two topics we're currently looking into, the exact placement of the second SIM card holder and improving the mechanical stability of the spacer frame, promised to yield a number of new parameters to keep track of, and I didn't feel too comfortable about continuing with the ad hoc approach for them.

There is now a better way: since many measurements come from the case scans, I've now added the ability to produce annotated "screenshots" to the program taking the measurements, and used them to document the key parts of the vertical stacking of Neo900:

https://neo900.org/stuff/werner/stacking/

The annotations are for "hands-on" use and aren't very pretty, but they should allow to see quickly what is going on. As often happens with this sort of endeavors, we discovered a surprising detail of how Nokia designed the spacers between the display module to the PCB.

The ingredients for generating the above page are in the repository:

https://neo900.org/git/?p=misc;a=tree;f=stacking

- Werner