Anyone out there running the orig Air-Tight PC-1 cart?

Hello, wondering if any of y’all are running the first Air-Tight PC-1 cartridge and what loading you settled on? I’ve been hoovering around 80-100ohm on my phono pre. I do mostly quieter, late night listening and i’ve found loading more than this seems to affect low level resolution. Any others with this cart please share your experiences.. thanks!