Even the 2hp 'Picnic Basket' (their 'Flagship Lunchbox') is presented with blank panels between modules. And they often do their public demonstrations with these spacers.
https://www.twohp.com/systems/picnic-basket

So the first and best suggestion will be to buy some blank panels (1 or 2HP), really. Not very exiting but much more comfortable.

  • Sweelinck

I know what you mean, as you can see all modules from their drum kit lunchbox are already on this rack. Thanks for the suggestion Sweelinck, I will probably add some space in between but without buying any blank panel for the moment. In future I will decide if keeping or replacing them, I mean I like how they sound and they are so small that they allow to add for more modules but I would like a little bit more variety. I would probably add up some dedicated effect or swap it with an analogue drumkit, if I find something that fits, in the future...

Even the 2hp 'Picnic Basket' (their 'Flagship Lunchbox') is presented with blank panels between modules. And they often do their public demonstrations with these spacers.
https://www.twohp.com/systems/picnic-basket

A small-format macro oscillator like Twin Waves or Beehive (a 8HP clone of Plaits) would be welcome in a small box to complete your Threshold.

Finally I’ll add an attenuverter/attenuator, and probably remove Jam Jam since you have Pam’s.
-- Sweelinck

interesting oscillators, but I would have to add more clocks and mixers and effects to include more voices, and there's not enough room. Definitely not something for small portable systems (actually I was thinking if adding a couple more voice, but on the drum side, like a double voiced percussion like bongos or something like that, but still, I would need extra clocks and mixer inputs, so.... )

I agree maybe I can remove the Jam Jam from this rack for the prosecution of this thread as it might be seen as redundant, however I can't understand why you would add an attenuverter/attenuator. May I ask you to explain why it would be something useful to add to this particular setup?

I originally started out thinking that I would be happy with Euclidian patterns for Drum sequencing but I quickly found I wanted more control so added a Roboux LL8 and later a Beatstep Pro. Is this someting you've thought of or are you completely happy as you are as you already have a lot of trigger options?
-- wishbonebrewery

You caught me again, I do have an extra module for Euclidean patterns 😁 but I am on the opposite journey as I got tired of classical sequencers and I am more interested in generative music now. That's why one option on the table is also to get extra modulations, I would get a second PAM PRO but I don't like duplicating modules. Maybe I can find something similar, like 2 or 4 extra PAMish channels of CVs modulators, but I still haven't checked if there is actually something like that around (and the PAM PRO itself is quite new).