I am a huge fan of the hammocks, but another trick may be easier......

Do you use a sling/pouch/Baby Bjorn carrier at the moment?

Olivia was a titch too (still is) and would often fall into a very deep sleep in the Baby Bjorn (I knew it was a deeeeeeeep sleep as her legs would be all floppy!). Only once she was in this deep sleep did I then transfer her into bed (she slept in a hammock). She would then sleep for HOURS.

We also used the "familiar smell" trick and she was often loosly wrapped in a worn T-shirt of mine, which sounds gross, but worked like a charm!

Good luck.........