A prime example of adding to Revelation: Revelation 7 never mentions heaven
Hmm. Oh. You are unaware that the throne of God is in heaven. So because you are unaware of this you think I have added to Revelation?
Revelation 7
9 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues,
stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;
10 And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb.
11
And all the angels stood round about the throne, and
about the elders and the four beasts,
and fell before the throne on their faces, and worshipped God,
12 Saying, Amen: Blessing, and glory, and wisdom, and thanksgiving, and honour, and power, and might, be unto our God for ever and ever. Amen.
Here maybe this will help. The throne of God is in heaven. That is where the elders and the four beasts are.
Revelation 4
1 After this I looked, and, behold,
a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter.
2
And immediately I was in the spirit: and, behold, a throne was set in heaven, and one sat on the throne.
3 And he that sat was to look upon like a jasper and a sardine stone: and there was a rainbow round about the throne, in sight like unto an emerald.
4 And round about the throne were four and twenty seats: and upon the seats I saw four and twenty elders sitting, clothed in white raiment; and they had on their heads crowns of gold.
5 And out of the throne proceeded lightnings and thunderings and voices: and there were seven lamps of fire burning before the throne, which are the seven Spirits of God.
6 And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.
Jesus stands on Mt Zion and selects the 144k out of the multitude. Rev 14:1-5
Revelation 14:3 - being redeemed does not mean removed. The 144K are the ones who proclaim the coming Kingdom. Isaiah 66:19
The 144,000 are redeemed
FROM THE EARTH.
It appears you are attempting to take away from the words of the book of Revelation.