Yea so prior to mounting in my eurorack it worked fine on it’s own. The dipswitch is hard wired to the board in the K-2 original case along with power, midi thru port and line output. So no chance i can put that in my rack. I always used it standalone with some simple patching with the model D and vice versa. I never attempted to use either as a midi thru device until I rack mounted them both and now that is the only way i’m going to be able to get my D to feed midi to the K-2. I only have a Native Instruments Komplete Kontrol keyboard which unfortunately only has midi out over usb with no cv ports. Trying to avoid un-mounting the K-2 and i’ve seen very little out there in the way of people using it mounted. Scoured youtube for what seems like an eternity trying to figure this out too lol