Digital interface for tube amplifier

This is the user interface PCB of a 19" 2 HE tube amplifier. The amplifier should combine digital electronics controlled by midi and a bridge to the analog tube circuit. The final amplifier will consist of 5 PCBs each containing a different part of the circuit in a modular design. The shown board is a two layer PCB with continuous ground plain In order to save layers VDD was distributed via wire bridges in some places which you see well on the picture. The PCB Size is 398 x 81 mm