Yup, he was Tom Scott's guitarist when they came over that time. In fact, Joey P was reminiscing about that time when they came over to Birds to jam with them. Unfortunately, Carlos wasn't able to jam coz there weren't any lefty guitars at the venue then.
It was Carlos who urged Joey to check out the vintage Rats - when they first met in New York a few years prior to their coming here.
Likewise for his unforgettable solos in Corea's Elektric Band debut album. I actually prefer Rios' solos in the title cut, 'Cool Weasel Boogie' and his other cuts compared to what Scott Henderson did..