A fascinating project, Frederik. Presumably, being 100% mechanical, there won't be any pistons, just fixed (?) combination pedals?
I forgot to mention one more change. We had a nice long talk one evening about a year ago where we discussed pros and cons of making the registration action electric instead of mechanical as originally planned. The cost would be about the same and we ended up agreeing that electric registration this day and age is reliable enough that the benefits outweigh the negatives (this may sound like a silly discussion, but the instrument is being built to last for centuries (literally), so we must ensure that every single component is, if not able to last that long, then at least easily serviceable or replaceable many years from now.
There are no combinations, neither as manual pistons nor combination pedals, fixed or otherwise, - yet. However, with the electric registration in place room has been made for a setzer combination system, which I have a feeling will be build in sometime in the not so distant future Here and now though I felt that the budget was best spent on getting voices. A setzer is easy to add, not so with an extra voice in a tracker action organ.
The foot steps you can see on the picture are couplers (the are doubled as draw knobs as well).
Here's a picture with a detail of some of the electric registration placed underneath the great organ chest, and a picture of the organ and the church taken from the choir. Note that none of the metal pipes in the great organ have been put in place yet, so what you see is only the casing and the Gedakt 16', hence it looks very dark, but when the pipes are put in then is will look very different. The third picture is taken from between the Great Organ and the Swell and Pedal Organ (Great Organ in front, Swell and Pedal Organs behind), and shows the Gedakt 16'. In the top left corner you can see a few Subbas 16' pipes as well as some of the swell shutters.