Marc,
Yes, John and myself, we can make a pattern of anything that is in a square or a rectangle shape, a so said ‘tile’.
This tile is then repeated orthogonally, up/down & left right.
For custom hatches John mostly uses a script by my hand called Tile2Hatch.
What you hatch with it doesn’t matter, that is the boundary of the area to hatch.
The hatching angle and the scale are properties you can set.
But if the different types must match then you need to think about a definition size and use them at a fixed scale factor.
To align hatches one can play with the hatch origin.
There Hatching is rather similar as linetypes, only line-segments can be used.
Curved line art must be approximated by line-segments.
Please send me a drawing with an example each of what you need, and indicate the repetitive nature with a box.
That can by PM our in this topic: Free Hatch Patterns
This topic is a about a tool to create hatch patterns based on fixed seeds.
Regards,
CVH