Couple of quickie updates:
Kyle Kaiser running COTA only (so far) for Juncos - explains his presence at the test.
https://www.thecheckeredflag.co.uk/2...-indycar-race/
Also, commentators on the test yesterday indicated Helio's only running the 500 (again, so far - seems likely he might run the Indy GP but AFAIK that has not (yet) been stated for 2019).