does this help? Naos CAN mean the whole temple (not just the inner courtyard) according to the Watchtower:
Insight 1988 page 860
The Greek term na·os' is used in a broad sense to stand for the entire temple complex (Joh 2:20) or for the central edifice, with its Holy and Most Holy compartments separated by the curtain. (Mt 27:51) When Zechariah, for instance, went "into the sanctuary" to offer incense, he entered the Holy, for it was there that the altar of incense was located.-Lu 1:9-11.
Insight page 1076
The Greek hi·e·ron' and na·os' are both rendered "temple" and The Greek hi·e·ron' and na·os' are both rendered "temple" and may refer to the entire temple complex or to its central edifice; na·os', meaning "sanctuary" or "divine habitation (dwelling)," at times refers specifically to the sacred inner rooms of the temple.
I guess according to the Watchtower, naos COULD mean the whole temple, or it COULD mean the inner courtyard; but it NEVER means the outer courtyards. Unless of course they say it does against their own literature.
If the great crowd is in the naos, then they are serving in the WHOLE temple or the INNER temple.
All the other translations I looked at simply say temple. This is a correct interpretation. To try and say inner or outer or the whole temple would be adding or taking away from the Scriptures.
Although I saw online soemwhere that Jesus threw the moneychangers out of the naos. This had to be the OUTER courtyard, if I recall, as Jesus was a descendant of Judah on both sides of his family, and only descendants of Levi (Levites) were allowed in the inner temple, the holiest, and then only the Levite Priest at that.
So now we have naos referring to :
1) the WHOLE temple
2) the OUTER temple
3) the INNER temple.
also, the word naos is used to refer to spiritual temple, for Paul refers to the word Naos and says the Christians are Naos, or will be naos.
4) a spiritual condition.
Dang those Greeks...
If you need the specific scriptures, holler. When do you need all this by?
I'm a little slow on the uptake. I'm trying to guess what point you are trying to make...
A case CAN be made that the 'great crowd without number' IS serving in heaven based on the word NAOS meaning inner courtyard in the OLD TESTAMENT Greek. (remember King somebody or other--Zechariah or Zacharia--offered incense in the naos and was punished for it because it was the inner temple that only Levites could go).
A case CAN be made that 'great crowd without number' IS NOT serving in heaven based on the word NAOS as used when Jesus threw the moneychangers out of the temple, which had to have been the outer courtyard.
A case CAN be made that 'great crowd without number' IS NOT serving in heaven based on the usage of the word Naos by Jesus as referring to his body.
A case CAN be made that 'great crowd without number' IS serving in heaven by virtue of Paul and John the Revelator also used Naos this way, not referring to a building at all, but apparently something to do with the spirit realm. The Watchtower will counter by saying that ALL Christians were anointed with a heavenly hope in those days.