Slide rule: Modder's help needed for adding a neat tool to the nav map!

[lambda*sqrt(u*x)]

Erm... I'm a geek when it comes to calculating stuff in combat sims. I really appreciate the OLC GUI for adding a nomograph and the U-Jagd tools...

...but I want something a bit more flexible. I feel the urge for having a plain slide rule, basically a ruler with a logarithmic scale embracing a sliding tounge with exactly the same scales aligned. When you slide the tongue, you add up or subtract logarithms, and the scales' index numbers actually represent multiplications or divisions. Usually, a slide rule also sports a transparent sliding window with at least one line for just helping you out as a "numeric memory", and several other lines that represent basic unit conversions.

For anyone interested, please contact me, I will provide the graphics, if you provide me
_the config file entries and the how-to to manually add it to any mod or version of SH3_.

Feel free to add your thoughts here, I'm not going to take more credit than scanning an original slide rule (got a 1940's one) for the one who helps turning this into a mod.

First thoughts: I _guess_ this can only be achieved by adding 3 separate draggable items (ruler, tongue and window), I have not seen a draggable item with subsequent moving parts yet.