I honestly forget that I’ve changed them. I picked up 3 packs of these and swapped out the giant oscillator knobs on the Neutron as well.
https://www.amazon.com/gp/product/B01F7KJDIM/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 I use this camera adapter from the Ipad and feed usb from the ipad into the USB connector on the MC8