Push buttons and button caps
The type of push-buttons used on the Portapack is SMD tactile switches of 6 mm per side and 7 mm of height. You can buy replacements here: https://a.aliexpress.com/_dZqx4vv
The easiest way to remove them is to clip the legs off, clean the pads carefully with solder wick and solder the new buttons.
You can also find replacement caps for the tactile switches: https://www.aliexpress.com/item/1005001700437278.html
Alternative caps for the switches: https://www.ebay.com/itm/284831256446
Use a 20 bit ec11 encoder.
It may have weird performances if you installed a 24 bit ec11.(Ref. https://discord.com/channels/719669764804444213/737376558754300081/951522295069962300)