Funnily enough, one of my projects has been a mini pedal board. Or at least a pedal board of mini pedals.
I've done it piecemeal over time, looking for bargains, and the envelope filter has been the sticking point. At present the slot is filled by the Mooer bass sweeper, but while a fine pedal, it's not exactly what I'm looking for.
However I hadn't even factored in the synth pedal so now I have to start gassing for that!