Dictum block plane mock up (rough)

I would like to make a holder for my single-handed plane that fits on the Multiboard. I have created a rough mock up of the block plane from Dictum.
As you can see in the pictures, it is about 1mm too short. But that doesn't bother me for the time being to be functional for me.

I think the castings of the following planes should also be the same:

Luban

Juuma

Woodriver

Quangsheng

However, that's just a guess, as I don't own them myself yet.