Nothing helpful to add but am in exactly the same position as you although my youngest daughter is only 9 weeks old. No problem getting her off to sleep but she just won't stay there unless I let her sleep on my chest or occasionally she'll go off in the pram; her naps are at longest half an hour but can be just ten minutes and she also seems very easily disturbed by noise. She's a very happy baby and good night sleeper in her basket so I wouldn't be worrying about the day if it wasn't for wanting to spend some proper time with my eldest. Anyway, completely unhelpful but I'll let you know if I find anything that works!