I managed to combine dawsonjon's RX-Quadrature-clocks code with that of R2BDY's TX code - all using a single Pico 2!
https://github.com/kholia/pico-hf-oscillator/tree/THE_MERGER - Code is open here.
This allows creation of transceivers powered entirely by Pico! No Si5351 needed ;)
Performance was checked and posted earlier and is good enough!