3 groups

On reading Rev 10 & 11, specifically the words to John that those who ate of the little book of Daniel in Rev 10 must prophesy again, and are then told to rise and measure the temple of God, the alter and those who worship in it, but to leave out the court which is given to the gentiles  who will tread down the holy city for 42 months (1260 days) but the two witnesses  are to prophesy for 1260 days clothed in sackcloth, a lot of truths are dovetailing into place.

Firstly the Temple is a measurement of time, chronology and prophecy. The first temple wall & curtain measurements add up to 6000c (6000 years) There are units of time of 1260 years/days, 30 days in a year,  4 seasons in a year. (See Ex 36) 

Secondly, the temple rooms and the court represent different time periods and groups in the Christian era.   The court is given to the gentiles (the papacy), for 1260 years, that ended in 1798. They had the alter and the laver, the cross and the cleansing. EGW was shown the first apartment was for the protestant world, who recovered the word in the loaves of bread and the spirit leading to evangelism, but for all those who didn't go into the most holy place in 1844, the door was shut; and the 2nd apartment, the most holy place, is for the 144,000 that was opened to them in Oct 22, 1844, and to them was given the ten commandments, the pot of manna, the torah, the rod that budded showing them to be the Levites of the renewed covenant with a special work.

Thirdly, this adds up exactly to the discovery that there are three groups in the final harvest! The barley harvest presented at the feast of unleavened bread representing the 144,000, the wheat harvest presented at Pentecost of the Protestant world, and the fruit harvest at Tabernacles, representing the gentiles harvest of Joel 2.  

So there ARE clearly 3 groups! It is revealed in the harvests and in the apartments of the sanctuary!  Does this then shed light on how God judges the three differant harvests.  The first harvest of the barley are perfect and nothing is done to them. The second harvest of the wheat are shaken, sifted, beaten, cooked in the furnace baked as a bread offering.  The third harvest is gathered from the trees and vines, and the winepress is trodden and the olives are pressed for the oil.