I got Zelph's modified Starlyte to work in my Caldera cone and did not like the results in long boil time. On contacting Zelph I found that yes by removing the insert it would act as a (unmodified) Starlyte. I found no issues in using that in 'the cone' Later I did end up using a steal washer as a restrictor to allow more control over cooking and that also worked well.
btw the lid that Zelph offers is great in that it is green and looks really nice but mine cracked and I am
about it, it would be really nice is Zelph would send me a replacement