Is kundalini awakening a requisit to Harvest?

[anagogy]

I have three questions now:

I - Is there difference between open the gateway to Intelligent Infinity and penetrate in the in the eighth or intelligent infinity?

Opening the gateway is fully opening or unblocking the indigo center. You can 'crack open the door a little' without fully opening the gateway. The gateway is not fully unblocked until the violet ray is penetrated consciously. Experiences of playing with the gateway will cause indigo expressions, or manifestations of intelligent energy, because this is the intelligent energy level.

II - Depending of the answer to the first question, the reports of perception the unity of All in meditation NOT indicates that the entity achived the ascension, but just open the gateway to  intelligent infinity right? Because I don't think that in all reports of samadhi for example, the entity become harvestable or capable of ascend. I see relationship with the Seven Initiations and possibly, open the gateway is the first initiation and the penetration is the last.

A being may temporarily open the door, but not be able to handle the full Light of the Sun, due to not being suitably prepared in mind, body, or spirit, and retreat back to a lower level of consciousness. Like lighting a fire but there isn't enough spiritual fuel (spiritual mass) to keep the fire self sustaining.

III - To become 51% STO don't need the penetration in the in the eighth or intelligent infinity right? It's just a requirement to be harvested in the end of the cycle or Harvest.

No. My understanding is that penetration of the 8th level allows a being to self harvest at will (walk the universe with unfettered tread). Actually, opening up the indigo center, alone, by itself, allows one to self harvest as well by use of intelligent energy. This is what negative adepts attempt to do, because they aren't interested in opening the violet ray center (it cannot be controlled from the ego and would result in switching polarity). They attempt to open the indigo center as much as they can, but not actually walk through it. They want power, not unity. So they seek unity only to the extent that it grants them more power.

Harvest at the end of a cycle of 3rd density merely requires that the kundalini be raised and stabilized at the heart center.