Yes you're right that he can't handle an A that long after his first nap. It took a bit of working out (with Erin's help

) but his first A was up to 3h 55 (plus because of the EW) and aiming for about 2h 10 for the second A - rather a huge difference!
So today we had an EW which I didn't hear again but when I checked at 6.15 he was awake -
WU and E 6.15 ish ?
A
E 9.10
S 10.15 - 12.15 capped, (so annoyingly I don't know what his exact A was but it was 4h 00 plus ? )
E 12.15
A
S 14.30 - 15.10 (school run 15.10 - 15.30)
A
E 15.30
A
S 16.40 - tried to get a CN here. Screaming/crying - couldn't settle. Tried to shush for a while but had a guest so had to give in and get him up. Wanted to get him down for an EBT but tricky with guest. Ended up this -
A
E 18.15
S 18.40

Now I feel we're in a bit of a mess with our routine. When things are working well he tends to start the day somewhere between 6.30 and 7.00 and at least I know exactly what A we're working with. I think I'll set the alarm for 6.00 tomorrow and see if I can at least catch when he's waking. If I can get our routine tweaked and get him waking at 7.00 at least I could be aiming for something like this-
WU 7
S 11/11.30 - 13/13.30
School pick up 15.10 - 15.30
S 15.30 for about an hour?
S 19.00
Our problem is working around the school pick up. Either I get in an extra 40 m nap pre pick-up but that means we have to get a CN quite late which never seems to work but the EBT option putting him down at 6.00 would mean that he has an A of 2h50 which is too much for him at that time.
He only seems to be able to do a post pick-up nap if it's quite early - no later than 4.00 but difficult to get there from one nap in the morning.
At least I won't have to work around my pick-up for the next two days..aaaahh the weekend...but I really don't know what to aim for next week. I so want him to get back to waking up at 7.00.