So, I am on day 4 of sleep training 10mo ds. Today my older boys have a music concert that I have to leave for by 2:15-20. DS EW at 4:50, I had him back down for first nap at 9:50 (was hoping for earlier today but some trouble settling). How long should I let him sleep to get another nap in at 1-2:15. He's got some OT built up due to sipped naps Monday-Wednesday and we still have lots of NWs (and some teething to boot). Am half inclined to AP the nap to ensure it happens but don't want to undo my hard work. Any suggestions on when to let him sleep till on this first nap?