@xnd2023 you can get inspired by my design from here: https://www.diyaudio.com/community/threads/my-second-try-on-digital-side.245781/post-3700799, single layer prototype and double layer final version. It's work from 2013 without any problem until now and without any additional heatsink and the phones output was used also to direct drive full tower 4-8Ω speakers for impedance measurements.