The KPA100 lives in the top of the K2. Where will the anticipated KAT100 live? If it won't be inside the K2, a cleaner solution for an all-Elecraft station may be to put the KPA and KAT in an EC2 enclosure leaving the K2 "stock" (assuming the KAT100 will fit in an EC2 with the amp). Rick KC0OV K2 1360