Why are you terrified of putting him on his back unswaddled?
Because we've NEVER done it before (on his back or unswaddled) and I didn't know what to expect. He woke NINE times (including twice early evening) but put himself back to sleep for five of those. Twice I fed him (df which he was awake for at 10.30 and again at 3.45).
Our routine is something like this (on a good day!):
6.30 feed
8 - sleep
9.30 - feed
11/11.30 - sleep
12.45 - feed
2 ish - sleep (this is where he will generally only have 45 mins or so)
3.45 - feed
5 ish - sleep for 45 mins
6.15 - feed, bath top-up feed and bed for 7 pm.
He has two good long sleeps in the morning and shorter ones in the pm. This morning, he was so tired after his night he slept for 1 3/4 hours and I had to wake him at 9.30.
Tomorrow I'm going to start back sleeping in the day too. No idea how much it will disrupt us (at the moment, I put him down, leave the room and five mins later he is asleep...
PS: Putting my forearm on his torso (hand on shoulder) whispering "shh" for a bit settled him last night (when he was roaring, which was only a couple of occasions).