usb hub:
https://www.aliexpress.com/item/4000548056083.html
buttons:
https://www.aliexpress.com/item/32842823837.html
sd card slots:
https://www.aliexpress.com/item/32961429620.html
hdmi extension:
https://www.aliexpress.com/item/32756226392.html
hdmi angle (upwards):
https://www.aliexpress.com/item/4000325502698.html
rj45 extension (haven't tried yet):
https://www.aliexpress.com/item/33018121064.html
-led slots are too small, need to make those larger.
-might add text for buttons and leds
back side, inside of the model, there's 2 markers, that show what layers should be printed as transparent.
top side should be printed open side up.
wiring of leds and buttons done according to i/o board schematics https://github.com/MiSTer-devel/Hardware_MiSTer/blob/master/releases/iobrd_6.1.pdf