Is raising any one of the drives out of the water, while the other two are running/working, a problem?

If one engine stops can that drive be raised to eliminate drag,or does that cause a problem?

Maybe a better way to phrase it: Are the drives designed to raise from the water independently while the other two continue to operate and drive the boat?

Leave it dragging. You will put too much strain on the tie bars doing that. I have run mine on two motors more than once due to various issues and it will get on plane easy if you just drop the tabs and go. I have got on plane using both rear motors and using port and center motors no problem. Trim all the drives the same.

Your best bet would be to remove the prop, and continue on as normal, or as close to such.

Thank you! First hand experience is Awesome!