I am running the 292S cam. I would FOR SURE use the EOS for the very first 'fire it up'!
It's that first 20 or 30 minutes that is SO important as to if the cam will live or die. THATS when you really need the EOS. I changed
oil after the initial breakin right away, looking for debris and wierd things, looked good. I did not use anymore EOS following that.
I then ran the motor for quite a few miles before I got around to putting the inner springs in. Not sure that was necessary, but I figured it couldn't hurt, kept the rpm down. My BIGGEST concern was if the lifters would rotate in their bore, if they dont you WILL have a flat cam no matter what you do. I think I'd leave the inner springs out until your ready to drive the car. Of course their a real pain in the butt to change once the engine is IN the car, but thats the way I did it!