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You can do whatever you want. Longer tube = macro. Do you want to tilt it? Just tilt it. Do you want some strange Petzval-style bokeh? Just take a piece of cardboard and make it.
It's heavy as hell
Meyer-Gorlitz Trioplan costs 50-100 times more and does the same thing.
As I couldn't find the adapter, I simply stuck it on the plastic box - and it works perfectly!
Focusing is easy and precise. Vignetting is non-existing, perfectly uniform brightness from the edge to the centre.
There is almost no coating thus you could expect some "washed" colours.
But the best thing... BOKEH!!!
Optically, this is Trioplan. A very simple design, 3 lenses only.
But it produces the effect of the "angel's ring". Instead of making the simple uniform circle as my modern lenses, this makes the transparent centre and the bright ring.
If you want to use it for the macro - take some longer tube :)
Most lenses designed for projectors are Trioplan, thus - pick lens any you like.