Taurean - we posted at the same time. I must say i am envious of yours and Izzys routine. I am quite willing to swap babies!
I hear what you are saying about trying to get them back to sleep after a catnap - in theory it sounds great - Violet won't do it -once her eyes are open she is up and ready for another 4 hour play session!
Thats a shame she hasn't put on much more weight - but if the time comes for you to switch to formula, you can be proud that you fought a tough battle. I'll give you A++++ for sheer willingness and determination.....never doubt yourself on that much. And all babies are different, so your next one not necessarily will have the same outcome

.....still in awe of your daily sleeping schedule!