If you know it's too cramped, why not get a bigger case? Branded cases are expensive, but have you thought about making your own? You don't need much knowledge about electronics to do this. You can find information on this online. A friend of mine has his eurorack in a second-hand metal briefcase. I have mine in a wooden case. The person at the hardware store cut the wood for me on the band saw and the only thing I had to do is put some nails in it and drill a hole for the power cord. That would open up your possible module choices tremendously, and give you a better user experience in the resulting system.
I also want to mention that Make Noise enjoys a legendary status but from a 'costs vs quality' or 'costs vs functions' perspective I'm not impressed with their modules.
Maths alternatives for half the price/A bit weird envelope generators: Befaco Rampage, Nano Arc, Cre8audio Function Junction.
I think you will really enjoy Schlappi Engineering Boundary Layer, it's slightly more expensive than Maths but has three channels and all kinds of logic functionalities, it also works as a chaotic oscillator and the envelopes are super tight.
Low Pass Filter alternatives: Takaab 2LPG, Erica Synths LPG, DUAL BORG. I recently used the DUAL BORG for the first time. It's a dual low, band and high pass KORG MS-20 with two built-in LPGs. Pretty good feature set.
You're running a mostly mono path right up to the MN X-pan and Beface Out. To take full advantage, either add more stereo stuff earlier in the path (stereo filter, stereo effects module) or swap out these modules for a quad VCA mixer or something like this. Depending on your setup, you can go straight out the VCAs without needing an extra output module.
Good luck, have fun.



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