@jsteiger i had a 470uf, 6v3 pop after i powered up one one freshly built 312DI pres. same as the cap in Matt's pic. mine is in C10m though. Can i write you for a couple of replacements?That is normal for red dot so no problem there. Just send me an email thru the store and I'll send you a new cap. I would suggest NOT using the DI on post 2622 mode unless the output is cap coupled.