An electronic assembly comprising: a first printed wiring board, PWB, on a first side of the electronic assembly; a first stiffener secured to the first PWB; a second PWB on a second side of the electronic assembly, opposite the first side; a second stiffener secured to the second PWB; a center stiffener seated in the second stiffener and between the first stiffener and the second stiffener, wherein the center stiffener has a first side facing the first stiffener, a second side that is opposite the first side and facing the second stiffener, a first end, and a second end, opposite the first end; electronic devices secured to the center stiffener, wherein the center stiffener dissipates heat from the electronic devices, and the electronic devices include power dies; characterised by wedge locks configured to secure the center stiffener between the first stiffener and the second stiffener based on compressive force, a first wedge lock mounting rail extending from the first end of the center stiffener configured to support a first set of the wedge locks, and a second wedge lock mounting rail extending from the second end of the center stiffener configured to support a second set of the wedge locks; and wherein the center stiffener is configured to transfer heat from the electronic devices on the first side and the second side and closer to the first end of the center stiffener to the first wedge lock mounting rail and is configured to transfer heat from the electronic devices on the first side and the second side and closer to the second end of the center stiffener to the second wedge lock mounting rail. a first printed wiring board, PWB, on a first side of the electronic assembly; a first stiffener secured to the first PWB; a second PWB on a second side of the electronic assembly, opposite the first side; a second stiffener secured to the second PWB; a center stiffener seated in the second stiffener and between the first stiffener and the second stiffener, wherein the center stiffener has a first side facing the first stiffener, a second side that is opposite the first side and facing the second stiffener, a first end, and a second end, opposite the first end; electronic devices secured to the center stiffener, wherein the center stiffener dissipates heat from the electronic devices, and the electronic devices include power dies; characterised by wedge locks configured to secure the center stiffener between the first stiffener and the second stiffener based on compressive force, a first wedge lock mounting rail extending from the first end of the center stiffener configured to support a first set of the wedge locks, and a second wedge lock mounting rail extending from the second end of the center stiffener configured to support a second set of the wedge locks; and wherein the center stiffener is configured to transfer heat from the electronic devices on the first side and the second side and closer to the first end of the center stiffener to the first wedge lock mounting rail and is configured to transfer heat from the electronic devices on the first side and the second side and closer to the second end of the center stiffener to the second wedge lock mounting rail.