Included:
- 4-layer PCB stackup
- 1 oz outer copper
- 0.5 oz inner copper
- 100 Ω differential target
- 50 Ω single-ended target
- notes to solve final widths/gaps from the fabricator stackup and keep matched RX routes layer-consistent
If you want, I can also add a recommended layer role table next, like L1 signal, L2 ground, L3 power/signal, L4 signal.