I though the Nanoweave only added 25% hp of your actual health (500hp) which is 125hp. But the description have changed to increase 250 hp, when did this happen?
Health (500)+ shield (500)= 1000 hitpoints. adding 250 in health = 1250 hitpoints The old one is Health(500)*nano(1.25)+shield(500)=1125 hitpoints. if I recall correctly