I suggested +5/10/15/25 to max OP per story point spent in some other topic (that is probably buried now). With that, player does not need to wait until the good hullmods are found first. It is also less pressure.
For example, on Ziggurat, I am really tempted to integrate Augmented Engines on it, but that hurts its combat power. I cannot get another Ziggurat, but I almost always have Augmented Engines on everything with burn less than 8. For now, I have refrained, but it is probably a matter of time before I gave in and integrate Augmented Engines on big Z for maximum OP savings. (Before people say bring more tugs, I cannot now that my fleet is filled up with ships, like several Phantoms for raiding.)