Dang, Deleted my first Reply. So here we go again:

Thank you Lugia, first of all! I'm not only running out of space, but also out of Amperes! I'm considering/planing a bigger case but a big sturdy wood DIY box and the Befaco Excalibus (1.25A on both 12V rails) at it's core. In the end it probably will be around the same price as the mantis or more, but I really don't like the mantis looks/material. Even with the bigger case I will still use the tiny modules. If I'm cool with the tiny 2hp sine in the middle of all my cables, there is not much else that can shock me. And then there is room to grow and space stuff out.

I already ordered the Antumbra DVCA. I had this on my list before and saw that pusherman has the full kit in stock so I grabbed it at an instance. The LPG will be next, was also on my watch list but didn't put it in the build before.

I also shoot myself in the foot as I see now that pusherman also has the nearness panels in stock. Anyways...

For the stereo Mixer I need to look into the Happy Nerding 3x Stereo Mixer (2x mutes and additional TRS out) vs. the Befaco ST Mix (4ins + aux). both coming in at 6hp.

The Noise Reap Paradox looks cool, reminds me of my first synth/toy, the Korg Monotron Duo (which probably is a extremly unfair connection I'm making here, but both are dual). I'll do my research on this VCO, but a nice 8hp oscillator should be easy to find.

Thank you again for your fantastic considerations and explanation!
I will keep on tinkering with the rest.