Pretty cool little board. I've never used space invader switches. Browns are tactile iirc.
I've got the all blacks and they do sound so nice when pressed and let go. I wished IBM kept making keyboards with these switches because they would of turned out really nice keyboards.
BS should of never been their final development. They should of gone all "Space-Invadery" with switches mounted to a 5 millimeter stainless steel plate sitting in an all PBT enclosure.
That would of been a keyboard that puts all others to shame.