I'd like £120, are you in the UK?
The hammond box was £20, the pots and knobs were £25, footswitches & jacks come to another £12. Everything inside is connected with detachable molex style trailing leads soldered to the board. The footswitches each have a potential dividers so all 3 can be connected to 1 analog gpio pin. Total spent around £120.
I have some specific logic for filtering the noise and decoding the single footswitch analog signal into 3 bools. Other than that, programming is the same as any other Axoloti.
It's missing a couple things. Could do with some LED's, I left some gpio's available for the purpose (that's why I used the potential divider trick on the footswitches)
Also, as mentioned before, power jack could be neater as currently a trailing lead. I was using a center negative psu so mounting the power jack would have short circuited +ve to ground. You could mount it to the chassis f you use a center positive psu or get an insulated power jack (as I was going to get round to one day, honest! : )
I wasn't using MIDI so that is also not currently available on the outside of the enclosure. If you need MIDI you'd have to mount it, I'd probably use jacks rather than the MIDI ports to save space. MIDI over jack should be fine connected to the available solder point for the opto-isolator.
There are also a couple extra holes drilled for more jack sockets that I didn't get around too. I was really trying to make full use of the gpio's by having 2 expression and 2 FS jacks, currently only 1 of each installed but the holes could be used for the MIDI, expression, FS, seperate mono in's and out's, however you want it!
Took me a couple days to build it all together, used it for a couple gigs then Corona happened and my music career ended! (it's ok, I'm retraining in cyber ).