Sounds like you’re far ahead of where I was when I started using that position. First few weeks it was tricep torture. Now can hold that position for 3+ hrs (not super comfortably just yet, but an hour is no problem).
I wouldn’t bother going to the virtual aero bar (VAB) position. The aero hoods position with hoods turns inwards is probably within 5-10 W while under 30mph, and offers far better bike control, and for me, better power output ability.
I only move to VAB when over 30mph air speed and when planning to stay that way for a while, but not supertuck. So, pretty rare.