I don't think it matters what rad cap you use. The system is still pressurized when heated, the culprit is the bloody OEM seal.Don't know. That's why I'm asking lol.
EDIT: Off topic, what's interesting is that Kawa did not redesign the seal, but the entire cylinder head is replaced with a new part number for the 2020-21 models. I have no idea when they did this or what if anything they changed.