This is a project I started just before Xmas. It was a really just an exercise to see how my nknob.pd abstraction would work in the real world, then morphed into a styling execise.
Stomp-board is a collection of guitar effects vaguely resembling stomp boxes. They can be arranged
and wired in any order and can be repeated as often as required. Each effect is given a unique name
when placing and this name is used to automatically save preset parameters against.
Effects are placed as objects in the normal Pd manner with one argument (eg [digi-delay Delay-1]) and connected with audio wires that should be in line with the round markers (there are fake inlets and outlet to the right as spacers)
As a graphics exercise its a failure because the nknob.pd is very heavy in the template area.
Its almost impossible to delete the effects objects as they grow in number (they will eventually delete though) and it is therefore essential to use the Quit button to end a session. There is a barely started help file.

stomp-board.pd is the demo (see pic), stomp-base.pd is the minimum start point.
I have collected the whole thing including the required externals in a folder Pd-effects-stand-alone
I think out of the box its windows only and in fact I have a folder for Pd 0.48 portable (empty) and a batch file stomp.bat that points to it (you will need to download Millers pd-vanilla portable version to use that)

Points of interest
In stomp-board.pd The looper can automatically record one cycle of drums from four-drums then stop the drums and play the loop and if the guitar is ready then record that on the next cycle

there is a wireless way to send messages to most controls via the unique name + control name
nknob has a range of 0-100

Any questions, please ask.
I have bash on my 1970's Ibanez strat-copy using this program just about every day
Cheers Balwyn

Pd-effects-stand-alone.zip

The following effects and control objects are available

active-switch.pd,
audio-catch.pd
audio-in.pd
audio-out.pd
audio-receive.pd
audio-send.pd
audio-throw.pd
audiobar.pd
chorus.pd
compressor.pd
controlbar.pd
data-send.pd
delay-only.pd
digi-delay.pd
distortion.pd
drum.pd
four-drums.pd
fuzzbox.pd
graphic-eq.pd
grater-v2.pd
lfo.pd
looper.pd
nknob.pd
noisegate.pd
panning.pd
para-eq.pd
phaser.pd
pitchshift.pd
pot.pd
presetter.pd
rec-player.pd
reverb.pd
rnd.pd
scope.pd
stomp-base.pd
stomp-board.pd
stomp.bat
tremolo.pd
tuner.pd
vcf-phaser.pd
volramp.pd
wavescope.pd

@balwyn really nice instrument and effect design great work. i also like the recording concept. it would be nice to here some recordings from your system. sadly, like you mentioned, with a full setup like stomp-board.pd the whole interface is quite slow on my computer. if its mainly because of the data structure knobs you could replace them with an external like that: https://forum.pdpatchrepo.info/topic/10938/new-knob-gui-object ?
but perhaps its not a solution because you started the project because of the knob, and its fast enough on your computer?
but, as you know, complex graphical guis always seem to be a problem in pd. because of that i like the idea of a modular ofelia interface, its not an easy task, but perhaps still possible.

@Jona I've started looking at ofelia and came up with this for a knob radial-knob.zip but that was long after I started stompboard. I have a lite version of stompboard using canvases and vslider for the knobs but it has some (a lot of) errors popping up and looks a bit odd Pd-effects - lite.zip
and here is link to some recordings using the grater effect

Here is a much lighter version using a simplified 'nknob' using a vslider and canvases, this allows for easy deletion of objects and stomp-board.pd will even shut down via the control box X (in about 7 secs)
Use the shift key for a finer adjustment of the smaller knobs
Its not interchangeable with any other version
Cheers
Balwyn
Pd-effects -lighter.zip