Would it be possible to add a column for "Actual Score" to LineupRewind when you run a calculations based on "My Projections"? This way you could see how your projected lineups would have actually performed.
It does exist, but it might not be as obvious. If you run calculations for actual score, it will turn the column on, and you can then run for "My Projections" and it will be on. Or, you can click the little gear icon in any lineup card produced and turn the actual score column on.