SCROG - Perpetual harvest?

I would like to try the scrog method for a more even canopy and larger same size buds throughout. Question is can I add a plant to the two that are currently in their first week of training having one finish later. I know I could have done a screen over each plant which is what i still may do as I am not that far into things. I want to add a plant each time I pull one out. Any opinions or ideas. I have a separate veg room. Then they were moved to the flower tent where I will train for a bit to get them into the screen. Is this feasible. I will take some pics if required.

The idea of seperate screen does not make sence and if u r veggin u can add more plants if its al at screen lvl during the veg when u flower all bud will be same height

Yes but once I flip to flower can I add other plants at different intervals.