Link cable issues

Hi all, I just got a Quest 3, and was using a link cable. It tested fine, and I tried it out on a shooter game, worked fine. Tried it out on Assetto Corsa, worked fine. 

Then, in setup, I saw it was asking me if I wanted to use Horizon Link as the runtime for Openxr, I stead of SteamVR. 

After that, I would get about 20 feet out of the pit on AC, and I would get black jagged lines in my peripheral, and things would get choppy.

I feel that I should have just left it using SteamVR, how can I change back?

Alternatively, I noticed that my wheel and pedals are plugged into the same 3.1 header as the link cable. Is it possible that SteamVR has no problem with that, but Horizon Link doesn't like it?

TIA