With a very slight modification to the previous variation we can join units to make quilts like this:
There are actually two different kinds of units, though they are almost the same, and in fact you could take them all to be the same, but to save time you only really need to do the following "extra" folding on the units that will be "on top" - that's the orange ones in the above picture---you can see there's more orange showing than blue.
The extra folding is as follows. Take a unit, as folded following the instructions here (this is with out the last step of shaping), and turn it over:
Then proceed as follows:
Turned back to front, and the finished unit looks like this:
Then we can join two together like this:
And four joined look like this, with second picture showing the reverse:
Click on the images to go to pages describing the variations: