Hi Luma
Reading the plan, it seems coming from a non-Märklin, german person with drawing-board past experience when the use of track design software was not as developped.
It seems to require a lot of M track but after all it is not impossible.
So sorry for not providing more info.
Here is a video of a large table layout with M tracks and many gold oldies from an American Märklin fan.
Size seems to be similar to yours (a bit wider perhaps).


Cheers
Jean

It´s nice to see these old vintage layouts, BUT...
IMHO:
The trackplan is about as bad as it can possibly get, in the sense of usefull trackage and possible routes.
For such a huge investment in space, AND that they have made the layout in more than 1 level, there is so much else you could do.

1) Get a longer run on the main-line. You need to fold the stupid double oval onto itself, so that you get almost the double length. I refer to the style used in the mother of classic M-layouts; the one from the 1971 catalogue! (-or even the video linked to by JohnJeanB)

2) Build a shadow-station, even if it is just a hidden siding for each oval.

3) The small shadow-station used in the plan showed here, is in a return-loop, which is located "wrong" in relation to the branchline. You would make life easier for yourself making this return loop available directly from the branchline and switching yard.

4) Tracklength in stations; Especially the main station is ridiculously limited, even when using 24cm tinplate waggons. Surely with 7m layout length one could do better!

Finally, in my very personal opinion; with such a huge space (7x3) a double oval layout is hardly doing justice to the massive space available. (Crushed dogbone style would be better)

All-in-all the layout looks more like it was designed for an exposition, rather than for a private home.

Hi Luma
A small observation I forgot to mention on your layout:
- track spacing when there is a significant height change, usually is slightly bigger.



Cheers
Jean

I can probably reach about 4 ft on a lay-out without doing major damage while leaning over.
That means you would need probably 3 cutouts on this size.
I can see one space where one might fit, but that leaves a large area that cannot be reached.
Tim