I'm not linked to these guys but I did see this. https://www.fidelityaudio.co.uk/tech...ock-4673-p.asp
years and years ago I did fetch up the possibility of swapping out the crystal reference in the 1210 and a few people mentioned the possibility, well here it is! It's a pity we couldn't drag Marco onto the net. I'm sure he'd like to talk about this one! ;)